McGwire Holbrook makes his way to the American Association after spending the first part of this season with the Missoula PaddleHeads in Montana in the Pioneer League. In five games, Holbrook hit .190 with one double and 3 RBI.

After finishing his college career, Holbrook spent time in the MLB Draft League with the Williamsport Crosscutters. In 47 games, the Florida native slashed .260/.343/.399 with five home runs and 32 RBI.

Before making his debut professionally, the catcher spent two seasons with the Florida State Seminoles after transferring away from West Virginia. During his junior season in 2023, he was placed on the Buster Posey Award Watch List, an accolade designated for the best collegiate catcher in the country. In two years with Florida State, Holbrook appeared in 58 games, starting 45 of them, where he hit at a .242 clip with two home runs and 27 RBI. He was a member of the 2024 team that made the ACC Championship Game and made a trip to the College World Series. Florida State entered the tournament as the eighth overall seed, cruising through the regional and super-regional rounds. In Omaha, the Seminoles lost the opening game to the eventual National Champion Tennessee Volunteers. The team made its way out of the loser's bracket, defeating #12 Virginia and #4 North Carolina before falling to Tennessee again in the semifinals.