As a freshman at Mississippi State in 2020, Tanner appeared in 14 games and batted .268 with two home runs before the season was cancelled due to the COVID-19 pandemic.[5] In 2021, as a redshirt freshman, he was the Bulldogs' starting catcher and slashed .287/.382/.525 with team-high 15 home runs and 53 RBIs over 67 games, leading Mississippi State to their first ever NCAA Championship.[6][7] After the season, he was named to the USA Baseball Collegiate National Team.[8] As a redshirt sophomore in 2022, Tanner returned as the Bulldogs' starting catcher and entered the season as a top prospect for the upcoming draft.[9][10][11] Over 55 games, he batted .285 with seven home runs and 38 RBIs and earned spots on the All-SEC Second Team and the All-Defensive Team.[12] Following the season's end, he traveled to San Diego where he participated in the Draft Combine.[13]
Professional career
Tanner was selected by the Cincinnati Reds in the second round with the 55th overall pick of the 2022 Major League Baseball draft.[14] He signed with the team for $1 million.[15] He made his professional debut with the Arizona Complex League Reds and was promoted to the Daytona Tortugas after one game. Over 17 games between the two teams, he hit .200 with one home run and seven RBIs.[16] Tanner returned to Daytona for the 2023 season.[17] He missed time due to injury but still played in 65 games, batting .202 with two home runs, 27 RBIs, and 15 doubles.[18] Tanner was assigned to the Dayton Dragons to open the 2024 season.[19]