To me, a trainer is someone who gets the players in the best possible shape to practice ( getting the right shoes, laces that fit, the right taping of the ankles, good hydration fluids, etc.) 
a coach is the person who transfers knowledge, skills, and motivates players.
as a new buzzerbeater user (General Manager) I kept looking for a place to hire a better coach.  now I have learned that the Trainer is what I could call a coach.  Does anyone else think this is confusing?  (of course, not if you read the rules 5 times, and non of them at work or after mdnight!!)
now I understand that the purpose of a doctor is to prevent injuries as much as to heal them....so  am learning