Last MLB team to reach into the college ranks for a manager was the Yankees when they hired Dick Howser from Florida State in 1980, hasn't happened since, the MLB game is managed differently that the college game where the 18, 19 and 20 year old kids can and will do anything and everything on the baseball field. At the MLB level, the roles are more specialized for a 162 game regular season and the long haul, with most starting players multimillionaires by the time they are 26.
Hope Tony stays with the game he knows best until he needs to specialize on the MLB dugout.