In 2016, his senior season, he batted .443 and was selected for the All-District and All-Section first teams as a designated hitter.
That summer, he played for the Bourne Braves in the Cape Cod League, starting two games and allowing only 1 run in 10 innings.
[6] He showed increased fastball velocity but did not pitch after March 8 due to an arm injury.
[8][10] Legumina made his professional debut in May 2021 with the Single-A Fort Myers Mighty Mussels.
However, in June, a foul ball hit him in the arm while he was sitting in the dugout, keeping him out of games for a month.
[12] Legumina started 2022 with Cedar Rapids and was promoted to the Double-A Wichita Wind Surge after three games.
[20] He made his MLB debut that day, pitching the final two innings of a blowout 15–0 win over the Philadelphia Phillies.
He was placed on the injured list with a right ankle contusion in mid-May, then right shoulder pain in late June.
His fastball velocity dropped by almost 1 mile per hour in his limited big league action in 2024.
[25] Legumina was designated for assignment by the Reds on January 30, 2025 after the team signed Austin Hays.