Draft and minor leagues Kiner-Falefa was selected 130th overall by the
Texas Rangers in the fourth round of the
2013 MLB draft on June 7, directly out of high school. Two days later, he signed a professional contract with the Rangers on June 9, and was assigned to the
Rookie-level AZL Rangers on June 20, where he began his professional career. That day, Kiner-Falefa made his
Minor League Baseball (MiLB) debut, playing in an away game against the
AZL Royals at
Surprise Stadium in
Surprise, Arizona. He failed to record a
hit in four
at bats, going 0-for-4, but reached base on a
fielding error to record one
stolen base and one
run in a 9–4 victory over the Royals. Kiner-Falefa finished the 2013 season
batting .322/.388/.356 with 11
runs batted in (RBIs) in 41 games. Defensively, he played the
second base and
shortstop positions throughout the season. Kiner-Falefa started the 2018 season with the
Triple-A Round Rock Express, batting .200/.333/.200 with one RBI in five games before being
called up to the MLB by the Texas Rangers on April 10, where he remained for the rest of the season.
Texas Rangers (2018–2021) Kiner-Falefa made his
Major League Baseball (MLB) debut on April 10, 2018, playing for the
Texas Rangers in a home game against the
Los Angeles Angels at
Globe Life Park in
Arlington, Texas. Four days later, on April 14, he hit his first career
home run in a game against the
Houston Astros. On June 20, he achieved a unique milestone by catching for pitcher
Austin Bibens-Dirkx in a game against the
Kansas City Royals. This marked the first time in MLB history that both members of a
battery had
hyphenated last names. Kiner-Falefa finished the 2018 season batting .261/.325/.357 with four home runs and 34 RBIs in 111 games. He was placed on the
injured list on June 7 and was recalled on August 2 to serve as a
utility infielder and third-string catcher. He finished the 2019 season batting .238/.299/.322 with one home run and 21 RBIs in 65 games. Kiner-Falefa finished the
2021 season batting .271/.312/.357 with eight home runs and 53 RBIs in 158 games. Defensively, Kiner-Falefa moved to
shortstop. He led the MLB with 436
assists and led the shortstop position with 98
double plays turned.
New York Yankees (2022–2023) during 2022 spring training at
George M. Steinbrenner Field Before the 2022 season, the
Texas Rangers traded Kiner-Falefa with pitcher
Ronny Henriquez to the
Minnesota Twins for
Mitch Garver on March 12, 2022. The following day, the Twins traded Kiner-Falefa with
Ben Rortvedt and
Josh Donaldson to the
New York Yankees for
Gary Sánchez and
Gio Urshela. Serving as the Yankees' starting
shortstop throughout the
2022 season, Kiner-Falefa finished the season batting .261/.314/.327 with four home runs and 48 RBIs in 142 games. During the
2023 spring training, Kiner-Falefa competed with
Anthony Volpe and
Oswald Peraza for the Yankees' starting shortstop position. Volpe ultimately won the role, and Kiner-Falefa transitioned into a
utility player. On April 13, he made his
pitching debut in the ninth inning of an 11–2 loss against the
Minnesota Twins. Notably, his second pitch, a 38.5
miles per hour (mph)
eephus pitch, was the slowest pitch ever recorded in Yankees history during the
Statcast era. This record was subsequently broken by
Austin Slater, another
position player who threw a 36.4 mph pitch during a
relief appearance on September 10, 2025. On June 14, during the
Subway Series against the
New York Mets, Kiner-Falefa
stole home off pitcher
Brooks Raley, becoming the first Yankee to accomplish this feat since
Didi Gregorius on August 27, 2016. On June 22, he made his third pitching appearance of the season in the ninth inning of a 10–0 loss to the
Seattle Mariners, marking the first time a Yankees position player pitched three times in a single season. He pitched a scoreless inning and recorded his first career
strikeout against
Eugenio Suárez. Additionally, batting as a pitcher in the same game, he hit a two-run home run off reliever
Chris Flexen, becoming the first Yankee to homer as a pitcher since
Lindy McDaniel on September 28, 1972, the final
season before the
American League (AL) adopted the
designated hitter rule. Kiner-Falefa finished the
2023 season batting .242/.306/.340 with six home runs and 37 RBIs in 113 games. He began the
2024 season with the Blue Jays, batting .292/.338/.420 with seven home runs and 33 RBIs in 83 games. He played with the Pirates for the remainder of the
2024 season, batting .240/.265/.322 with one home run and 10 RBIs in 50 games. He played with the Blue Jays for the remainder of the
2025 season, batting .233/.258/.367 with one home run and five RBIs in 19 games. Following the 2025 season, Kiner-Falefa became a
free agent.
Boston Red Sox (2026–present) On February 10, 2026, Kiner-Falefa signed a one-year, $6 million contract with the
Boston Red Sox. ==Personal life==