Frank Thomas is a former professional first baseman and designated hitter. Drafted seventh overall by the White Sox in the 1989 MLB draft, Thomas made his major league debut the following year and immediately impressed with his hitting ability.

He played for three AL teams from 1990 to 2008, all but the last three years with the Chicago White Sox. A five-time All-Star, he is the only player in major league history to have seven consecutive seasons with at least a .300 batting average, 100 RBI, 100 runs scored, 100 walks, and 20 home runs (as of 2021). Thomas also won the AL batting title in 1997 with a .347 mark. Thomas was named the AL's Most Valuable Player (MVP) by unanimous vote in 1993. That year, he became the first White Sox player to hit 40 home runs and led the team to a division title. He repeated as MVP in the strike-shortened 1994 season, batting .353 and leading the league in slugging percentage and runs. Following two sub-par seasons, Thomas lost a close MVP vote in 2000 despite posting career highs of 43 home runs and 143 RBI. Still, he was named AL Comeback Player of the Year, and Chicago finished with the AL's best record.

Thomas spent the final three years of his career with the Oakland Athletics and Toronto Blue Jays, with whom he hit his 500th home run. In 2014, Thomas joined Fox Sports as a studio analyst for MLB on Fox. On June 24, 2017, Thomas gave a live speech during Mark Buehrle's White Sox #56 retirement ceremony about Buehrle's career and his time being his teammate.