Draft and minor leagues (2018–2021) The
Philadelphia Phillies selected Vierling in the fifth round of the
2018 Major League Baseball draft. After signing with the team, he was assigned to the short-season
Williamsport Crosscutters. Vierling batted .420 in 12 games and was then promoted to the
Class A Lakewood Blue Claws for the remainder of the season. He spent the 2019 season with the
Clearwater Threshers of the
Class A-Advanced Florida State League. Vierling did not play in a game in 2020 due to the cancellation of the minor league season because of the
COVID-19 pandemic. After starting the 2021 season at the Phillies' alternate training site, Vierling was assigned to the
Double-A Reading Fightin Phils to begin the minor league season. He was promoted to the Class AAA
Lehigh Valley IronPigs after hitting .345 with 6 home runs and 16 RBIs in 24 games with Reading.
Philadelphia Phillies (2021–2022) On June 19, 2021, Vierling was selected to the 40-man roster and promoted to the major leagues for the first time. He made his Major League debut that day as a
pinch hitter, hitting a single to right field in his first at-bat off of
San Francisco Giants reliever
Jarlin García while also stealing second base and scoring a run. He hit his first Major League home run on September 25, 2021, in Philadelphia in a 3–0 win over the
Pittsburgh Pirates. In 2021, he had the fastest sprint speed of all major league first basemen, at 29.2 feet/second. By the first anniversary of his MLB debut, Vierling had started a game at six positions (1B, 2B, 3B, LF, CF, and RF). On June 7, 2022, he was recalled to the Phillies from AAA affiliate,
Lehigh Valley Iron Pigs, and hit the game-winning home run off of
Josh Hader. Vierling's first multi home run game was on June 17, 2022, in a win against the Washington Nationals. On September 21, 2022, Vierling went 5-for-5, including his first walk-off hit in the 10th inning, in a 4–3 win against the Toronto Blue Jays, halting a five-game losing streak. In the 2022 regular season, he batted .246/.297/.351 in 325 at bats, with six home runs, 32 RBIs, and seven steals. He had the fastest sprint speed of all Phillies players, at 29.6 feet/second. He played 61 games in center field, 37 in right field, 30 in left field, four at second base, and two at first base. Vierling played in 12 games during the Phillies playoff run to the World Series in 2022. He had 15 plate appearances, with two hits, one walk, one RBI, and two runs.
Detroit Tigers (2023–present) On January 7, 2023, the Phillies traded Vierling, infielder
Nick Maton, and catcher
Donny Sands to the
Detroit Tigers for pitcher
Gregory Soto and infielder
Kody Clemens. For the 2023 season, Vierling played 134 games, batting .261 with 10 home runs and 44 RBI. In the 2024 season, he hit .257 with 16 home runs and 57 RBI. On January 9, 2025, the Tigers and Vierling agreed to a one-year, $3.005 million contract, avoiding arbitration.
Injuries Vierling started the 2025 season on the injured list with a strained
rotator cuff. He returned to the active roster on May 23. However, after two more stints on the disabled list, the second shutting him down on August 10 due to an oblique strain, he played only 31 games for the 2025 Tigers. He hit .239 with one home run and 11 RBI. == Player profile ==