In the hands of the right writer/director, this could be an interesting picture, but the logline doesn't sell it. Multi-protagonist...
Aren’t you giving away the ending? Maybe say “as he pursues” or “in pursuit of” a championship trophy, etc.
Not necessarily. If he doesn’t get the kids to buy into his system he won’t win the trophy, trophy wife or the apple of his eye. Of course his bigger goal is to coach the rewards are just icing one the cake.