Arizona Diamondbacks (2011–2012) Minor leagues While Cole was projected to go first overall in the
2011 MLB draft, Bauer's performance during the 2011 NCAA season saw his stock rise among MLB scouts. As predicted, the
Pittsburgh Pirates selected Cole first overall, while Bauer went to the
Arizona Diamondbacks two selections later. It was the first time that two college teammates were selected first and third overall in the same MLB draft since 1978 (when the
Atlanta Braves took
Bob Horner first in the draft and the
New York Mets selected
Hubie Brooks third overall). Bauer signed with the Diamondbacks on July 25 and was subsequently assigned to the
Class A-Advanced Visalia Rawhide of the
California League. He made only three appearances with Visalia, pitching 14 innings and allowing three
runs before being promoted to the
Double-A Mobile BayBears that August. Bauer debuted with Mobile on August 16, striking out eight batters and allowing five
hits in five innings of work. Bauer picked up his first professional baseball win on August 20, pitching five innings in Mobile's 13–6 victory over the
Jacksonville Suns. In four starts with the BayBears that year, Bauer went 1–1 with a 7.56 ERA, striking out 26 batters in innings of work. Bauer entered the 2012 season as the Diamondbacks' top-rated
prospect, and the ninth overall prospect in MLB. He received an invitation to the Diamondbacks'
spring training and went 1–0 with a 3.60 ERA in 10
Cactus League innings. Ultimately, however, Bauer failed to displace
Josh Collmenter in Arizona's
starting rotation, and was assigned back to Double-A Mobile shortly before
Opening Day. He made eight more starts in Double-A, going 7–1 with a 1.68 ERA and striking out 60 batters in innings, before receiving a promotion to the
Triple-A Reno Aces on May 17. At the time of his promotion, he led the
Southern League in wins, strikeouts, and ERA. Bauer was selected to pitch in the 2012
All-Star Futures Game, but was unavailable as the Diamondbacks had called him up to the major leagues. (His replacement was
Tyler Skaggs). At the time, he had a combined 11–1 record and 2.23 ERA between Reno and Mobile.
Major leagues On June 27, 2012, the Diamondbacks called Bauer up from Reno in order to replace an injured
Joe Saunders. He was scheduled to start the next day, becoming the first member of the 2011 draft class to make his MLB debut. He picked up his first win on July 8, holding the
Los Angeles Dodgers to six scoreless innings as the Diamondbacks ultimately won 7–1. After four major league starts, during which Bauer went 1–2 with a 6.06 ERA, he was sent back down to Reno, where he was shut down for a period of two weeks in order to preserve his health during his first full season of professional baseball. He finished the season there, helping the Aces reach their first
Pacific Coast League and Triple-A baseball championships. In the championship game against the
Pawtucket Red Sox of the
International League, Bauer took another no decision as he allowed two runs in innings. In 14 total starts for Reno, Bauer posted a 5–1 record and a 2.85 ERA, striking out 97 batters in 82 innings. After the trade, it was revealed that Bauer had been unpopular with most members of the club. His Diamondbacks batterymate
Miguel Montero said that he had struggled to catch for Bauer, as he ignored his pitch calling and would "tell [Montero] how to do [his] job". Diamondbacks president
Derrick Hall told reporters that Bauer "had a really tough year" with Arizona, and that the pitcher had apologized for his attitude to several veteran players. That February, Bauer released a
rap song on
SoundCloud called "You Don't Know Me", a purported
diss track against his former teammate. Bauer began retooling his pitching delivery after the 2012 season, and entered spring training with the Indians with the intention of "overwrit[ing] eight to 10 years of neuromuscular programming". He was not named to the Indians' 2013 opening day roster, instead making up part of the starting rotation for the Triple-A
Columbus Clippers. He was recalled on April 6 for a game against the
Tampa Bay Rays, giving up a career-high seven walks in a 6–0 loss. Bauer's difficulties with fastball command carried through the season, and when MLB rosters expanded from 25 to 40 in September, Bauer was not included among the additional 15. He started four major league games that season, posting a 1–2 record and a 5.29 ERA while striking out 11 batters in 17 innings. The Indians optioned Bauer to Columbus at the start of the 2014 season, a decision that they hoped would allow him to become more comfortable pitching in the organization. He took the loss in that game despite recording eight strikeouts, but continued to progress in Columbus. On May 20, Bauer received his second call-up of the season, replacing
Danny Salazar for a start against
Detroit Tigers ace and
Cy Young Award winner
Justin Verlander. Bauer took the win, giving up only two runs in seven innings of the 6–2 victory. The biggest improvement of Bauer's season was in limiting walks: by June 24, he had lowered his rate of
bases on balls per nine innings pitched (BB/9) to 3.4, an improvement over his 8.5 BB/9 during the previous season that he attributed to ironing out his mechanics. Bauer made 26 major league starts in 2014, going 5–8 with a 4.18 ERA and striking out 143 batters in 153 innings. After an April in which he went 2–1 with a 4.19 ERA, Bauer particularly struggled at the start of May, giving up 11 runs in his first innings of the month. Bauer drew his first hit as a batter on June 16, recording a leadoff
single against
Jake Arrieta of the
Chicago Cubs. He said later that he "didn't think [he'd] ever get a career hit", and that he had closed his eyes while making contact with the ball. On July 28, he pitched his first major league
complete game, a 2–1 loss against the
Kansas City Royals that pushed Cleveland to an eight-game losing streak at home, their longest in 40 years. As the season progressed, Bauer continued to struggle with allowing home runs, and he was moved to the
bullpen on September 17, with
Josh Tomlin and
Cody Anderson filling his position in the starting rotation. He finished the season with an 11–12 record and a 4.55 ERA, as well as 170 strikeouts in 176 innings. Bauer also led the
American League (AL) in walks that season with 79. After Carrasco suffered a leg injury on April 25, however, Bauer moved into his place in the rotation. The acquisition of catcher
Chris Gimenez from the
Texas Rangers on May 4 helped Bauer with his fastball command on the mound. Gimenez had been acquired to replace backup catcher
Roberto Pérez, who had broken his thumb. He became Bauer's regular catcher from then on, with Bauer going 3–1 in his first nine starts with Gimenez as his batterymate. His second complete game came on June 22, with a three-hitter against the Tampa Bay Rays to give the Indians a six-game winning streak. Bauer finished the regular season with a 12–8 record, a 4.26 ERA, and 168 strikeouts in 35 games (28 starts) and 190 innings of work. The team went on to take the best-of-seven series in five games, thus advancing to the World Series. Bauer started Games 2 and 5 of the
2016 World Series, losing both games and posting a 5.40 World Series ERA. The Indians lost a very competitive series in seven games; the series ended in extra innings of the final game.
2017–19 On January 12, 2017, Bauer agreed to a one-year, $3.55 million contract with the Indians, twice as much as he had earned the prior season. The first two months of the
2017 season were a disappointment for Bauer, who allowed 11 home runs and 38 earned runs in his first 10 appearances. He described the first half of the season as "miserable", and was often upset when he was scheduled to start, because it "didn't feel like [he] was contributing to the team". The nadir of Bauer's season came on June 16, in his first start after the All-Star Game break, when Bauer allowed four runs, three hits, and two walks before he was taken out of the game in the first inning. The incident was a turning point for Bauer, who turned his season around by posting a 10–1 record and 2.60 ERA in his last 14 starts. In particular, he improved at limiting the damage of home runs against him, increasing the proportion of solo shots to multi-run home runs. By the end of the regular season, Bauer had a 17–9 record and a 4.19 ERA in 32 games, and had struck out 196 batters in innings. Bauer's no-hit innings set an Indians postseason record; previously,
Bob Feller and
Early Wynn had gone five no-hit innings each in the
1948 World Series and the
1954 World Series, respectively. The Yankees bounced back to win three of the next four games, taking the best-of-five series in five games. During the 2017–18 offseason, Bauer estimated that he had pitched a total of 40 practice innings with UCLA alumni in order to present a new
slider for the
2018 MLB season. The result was a dominant first half of the season, in which Bauer was second in the AL with a 2.24 ERA, third with 175 strikeouts, and third with 4.5
Wins Above Replacement. The Indians, meanwhile, were 7.5 games ahead in the
AL Central going into the All-Star break. Bauer received his first All-Star selection in 2018 and was originally meant to begin the tenth inning for the AL team, but manager
A. J. Hinch ultimately allowed
J. A. Happ of the Toronto Blue Jays to attempt the
save. Bauer's push for the AL
Cy Young Award was put on pause when he took a line drive to the leg from
José Abreu on August 11 during a game against the
Chicago White Sox. The hit caused injury and swelling, and an MRI revealed a
stress fracture that required a walking boot and four to six weeks of recovery time. Bauer began pitching again on September 22, throwing scoreless innings of relief against the
Boston Red Sox so that Cleveland management could decide whether he would be able to start in a potential postseason run. The
Houston Astros took an early lead in the
2018 ALDS, but were able to sweep the Indians after Bauer committed two throwing errors in Game 3 of the series, turning a 2–2 game into an 11–3 rout by Houston. In his first two starts of the
2019 season, Bauer went 14 innings, striking out 17 batters and allowing only one hit. In addition to starting the season with a 0.64 ERA, Bauer became the first pitcher in MLB history to begin a season with back-to-back starts of five or more innings while giving up one hit. As the season progressed, Bauer's ERA built to 3.79 with the Indians, and he revealed later that he had only been healthy for one third of his starts. An awkward throw in the fourth inning of his fourth game of the season had partially torn the ligaments in his ankle, and as he changed his stance to compensate for the injury, he began to suffer back spasms. After recovering from the injuries, he fell ill. On July 28, after allowing the go-ahead run in a game against the Kansas City Royals, Bauer became frustrated and threw a ball over the center field fence of
Kauffman Stadium. Manager Terry Francona, arriving on the mound to pull Bauer from the game, became angry with the gesture, and Bauer apologized after the game, calling the incident "childish" and "unprofessional".
Cincinnati Reds (2019–2020) On July 31, 2019, the Cincinnati Reds acquired Bauer in a three-team trade with the Indians and the
San Diego Padres. Cleveland acquired
Yasiel Puig and
Scott Moss from Cincinnati and
Franmil Reyes,
Logan Allen, and Victor Nova from San Diego, while the Reds sent prospect
Taylor Trammell to the Padres. Bauer struggled in his team debut, lasting only innings while allowing three runs on seven hits, walking three batters, and hitting another batter with a pitch. He followed a difficult first start with a dominant appearance over the Chicago Cubs, striking out 11 batters as Cincinnati won 5–2. Bauer remained an inconsistent force in the Reds' starting rotation: in his first 10 starts with the new team, he posted a 2–5 record with a 6.39 ERA and 12 home runs. In five of those first ten starts, he allowed five or more earned runs. Bauer was frustrated with his own performance, referring to the back half of the season as "one step forward, two steps back". He ultimately went 11–13 for the season in 34 starts between Cleveland and Cincinnati, posting a 4.48 ERA and striking out 253 batters in 213 innings. Bauer avoided arbitration prior to the
2020 MLB season, agreeing to a one-year, $17.5 million contract with the Reds on January 10, 2020. As the season was indefinitely paused, first due to the
COVID-19 pandemic and then as negotiations between the league and
players' union reached a stalemate, Bauer became frustrated with the lack of play, saying that the suspension had done "irreparable damage" to the sport of baseball. Bauer ultimately put out a career-best year during the shortened 60-game season, posting a 5–4 record and leading the league with a 1.73 ERA in 11 starts while striking out 100 batters in 73 innings. As the regular season built to a close, Bauer began pitching on short rest, starting every fourth day rather than every fifth to help the Reds clinch a postseason berth. Bauer was selected to start the opening match of the Reds'
2020 National League Wild Card Series against the Atlanta Braves, pitching scoreless innings in what was ultimately a 13-inning loss for the Reds. It was the first postseason game in MLB history to remain scoreless after 11 innings of play, while Bauer became the first pitcher to last seven or more innings with no runs, fewer than three hits, no walks, and 12 or more strikeouts. He also set a Cincinnati record for the most strikeouts delivered by a pitcher in the playoffs. Although Atlanta swept Cincinnati during the Wild Card series, Bauer bested
Yu Darvish of the Cubs and
Jacob deGrom of the
New York Mets in voting for the NL Cy Young Award. He was the first pitcher for Cincinnati to receive the award; previously, the Reds were the only active MLB team founded prior to 1961 that had never boasted a winning pitcher. Bauer rejected the Reds' $18.9 million
qualifying offer on November 4, 2020, making him a
free agent, but he said he remained open to rejoining the team.
Los Angeles Dodgers (2021–2023) After becoming a free agent, Bauer courted offers from a number of MLB teams, ultimately turning down a deal from the New York Mets to sign with the Los Angeles Dodgers on February 5, 2021. The Dodgers signed Bauer to a three-year, $102 million contract, with opt-out options after the 2021 and 2022 MLB seasons. Some concerns had been raised among the Mets over Bauer's social media use, including two incidents in which women accused Bauer of harassing them online. The Dodgers were aware of Bauer's abrasive reputation, but were willing to overlook it in favor of his pitching ability, with
Mookie Betts telling the
Los Angeles Times, "He is who he is. You know what you're getting and so I don't really worry about it. It doesn't bother me." Bauer pitched for the Dodgers in 2021, amassing an 8-5 record and a 2.59 ERA in 17 starts. As of June 29, 2021, he led MLB with innings pitched and 137 strikeouts.
Administrative suspension and release On July 2, 2021, MLB placed Bauer on administrative leave while an internal investigation was opened into
sexual assault allegations that had been made against him. On September 10, MLB and the players union agreed to extend Bauer's leave through the remainder of the 2021 season. MLB's investigation into Bauer was suspended due to the
2021–22 MLB lockout, and he began the 2022 season on administrative leave as the investigation continued. In April 2022, Bauer was suspended for 324 games without pay. Following an appeal by Bauer, an arbitrator reduced Bauer's suspension to 194 games, reinstating him immediately while docking his pay for the first 50 games of 2023. On January 6, 2023, the Dodgers
designated Bauer
for assignment. He was officially released on January 12.
Yokohama DeNA BayStars (2023) On March 13, 2023, Bauer agreed to an incentive-laden one-year, $4 million contract with the
Yokohama DeNA BayStars, a
Central League team in
Nippon Professional Baseball. The Dodgers paid the remainder of his $22.5 million salary for 2023. On May 3, he pitched his first baseball game since leaving the Dodgers, in a 4–1 win over the
Hiroshima Toyo Carp. He was nominated for the
NPB All-Star Game and named the June MVP. In 19 games for Yokohama, he registered a 10–4 record and 2.76 ERA with 130 strikeouts across innings pitched. On November 30, Bauer elected free agency.
Diablos Rojos del México (2024) On March 18, 2024, Bauer announced that he would start the season by pitching in six games for the
Diablos Rojos del México of the
Mexican League (LMB). On April 21, in his second start for the Diablos, Bauer pitched six innings, recording 14 strikeouts including an immaculate inning in the 4th, and struck out nine consecutive batters, equaling the league record. At midseason, Bauer led the league in ERA (1.50) and strikeouts (62) and was tied for the lead in wins (5). He was selected to the LMB All-Star Game and named the starting pitcher for the South Division. On May 25, Bauer agreed to a contract extension with the Diablos for the remainder of the 2024 season. On June 21, Bauer set the Mexican League single-game strikeout record with 19 strikeouts against the
Guerreros de Oaxaca. In 14 starts, he recorded a 10–0 record and 2.48 ERA with a league–leading 120 strikeouts across innings pitched. Additionally, his 10 wins were tied for the league lead alongside
César Valdez and
Juan Pablo Oramas. Bauer's milestones came despite multiple health issues that he battled during the regular season, which he detailed in videos posted to his YouTube channel. He was sidelined for nearly two weeks in mid-July due to gastrointestinal issues, which were later diagnosed as
ulcerative colitis. After starting medications, Bauer developed partial
paralysis and numbness in his lower extremities. He left the team in early August and returned to Arizona to seek medical treatment. It was later revealed he had been diagnosed with
Guillain–Barré syndrome, which was caught early and subsequently treated with
immunoglobulin therapy. Bauer missed the first series of the LMB playoffs, but returned following successful treatment of GBS. During the playoffs, Bauer posted a 1.67 ERA and struck out 32 batters over 27 innings pitched, culminating in the Diablos winning the
Serie del Rey. Following the season, Bauer was awarded as the 2024 Mexican League Pitcher of the Year.
Yokohama DeNA BayStars (2025) On January 27, 2025, Bauer signed with the
Yokohama DeNA BayStars of
Nippon Professional Baseball, marking his second stint with the team. He made 21 appearances for Yokohama, posting a 4-10 record and 4.51 ERA with 119 strikeouts across innings pitched. On December 2, Bauer and the BayStars parted ways.
Long Island Ducks (2026–present) On April 2, 2026, Bauer announced that he had signed with the
Long Island Ducks of the
Atlantic League of Professional Baseball. On April 26, 2026, he threw a seven-inning
no-hitter. ==International career==