70) Mike Napoli
Mike Napoli is one of the least experienced people on our list but he could very easily become an MLB manager.
Napoli, 40, was a catcher and first baseman in the majors for parts of 13 seasons with the Angels, Rangers, Red Sox, and Indians before calling it a career after the 2017 season. He took two seasons off before returning to baseball with the Cubs in 2020 as their quality assurance coach.
He and David Ross played together on the 2013 and 2014 Red Sox and that connection and their friendship from being with the Red Sox is what got Napoli on the Cubs coaching staff.
Before he even returned to baseball to coach, he said that he would love to be an MLB manager someday but after he had some time coaching.
Given that he was a catcher (a leadership position in and of itself) and he played for some of the best baseball minds in recent memory (the aforementioned Mike Scioscia, Ron Washington, and John Farrell, current Guardians manager Terry Francona, and (spoiler!) someone else coming up here shortly in Jeff Banister), Napoli could easily be an MLB manager in the near future if he decides that he wants to be one.