Helman was drafted by the Minnesota Twins in the 11th round, with the 334th overall selection, of the 2018 Major League Baseball draft.[6] He signed with the Twins and split his first professional season between the rookie–level Elizabethton Twins and Single–A Cedar Rapids Kernels, batting .361 with four home runs over 39 games between the two teams.[7] He spent the 2019 season with the High–A Fort Myers Miracle where he hit .197 over 82 games, missing the end of the season after breaking his arm.[8] Helman did not play in a game in 2020 due to the cancellation of the minor league season because of the COVID-19 pandemic.[9]
Helman returned to Cedar Rapids for the 2021 season and batted .246 with 19 home runs, 57 RBI, and 21 stolen bases over 111 games.[10] He opened the 2022 season with the Double–A Wichita Wind Surge before he was promoted to the Triple–A St. Paul Saints.[11] Over 135 games between the two clubs, he slashed .258/.337/.423 with twenty home runs, sixty RBI, and forty stolen bases.[12] Helman played only 38 games in 2023 due to injury, playing with Fort Myers, Wichita, and St. Paul, batting .302 with seven home runs and forty RBI.[13]
Helman began the 2024 campaign with St. Paul, slashing .283/.367/.508 with 13 home runs, 43 RBI, and 10 stolen bases. On September 1, 2024, Helman was selected to the 40-man roster and promoted to the major leagues for the first time.[14]