Professor

From MLB Power Pros Wiki

The Professor is your character's teacher at Powerful University. He administers all exams, determines your grade, and sometimes gives you homework. When completed, this extra work can net your character extra items and abilities.

The professor also dabbles in art (which apparently isn't very good), and occasionally makes appearences in your nightmares, expelling you from college. He is apparently narcoleptic, and easily falls asleep while lecturing, administering tests, and walking around campus.