Mike Napoli
When the Chicago Cubs appointed Mike Napoli as their quality assurance coach in 2019, they knew his potential as a player. He has been more than reliable since and was promoted to the first base coach before the 2022 season. Anyone who knew him as a player would hardly be surprised by his knowledge of the game.
Napoli began his career with the Butter Cupper Kings in 2000 before making his Major League Baseball debut with the Los Angeles Angels in 2006. He went on to play for the Cleveland Indians and Boston Red Sox, where he holds the all-time single-season records for most strikeouts.