Matt Thaiss was drafted by the Angels in the first round of the 2016 draft as the 16th overall pick. Being mainly drafted for his bat, as soon as he joined the organization, he was moved to first base and also saw playing time at third. Thaiss, who bats left and throws right, worked his way through the Halos minor league system and made his MLB debut on July 3, 2019 against the Texas Rangers, doubling in his first at bat. In spring training for the 2021 season, Thaiss returned to catching for the first time since being drafted and made progress in Triple A for most of the year.