Sam Selman was drafted out of Vanderbilt by the Kansas City Royals in the second round of the 2012 draft. He made his MLB debut on August 1, 2019, with the San Francisco Giants, after he left the Royals through free agency before the start of the 2019 season. His career with the Halos began on July 30, 2021 when he was traded to the Angels along with José Marte and Ivan Armstrong in exchange for Tony Watson.
Selman was activated the day after the trade, and pitched in games throughout August and early September, until he was optioned to the Salt Lake Bees on September 23rd.