A disgraced coach gets a second chance but must teach couch potato kids about baseball and life to win a championship trophy, a trophy wife, and the apple of his eye.

This feels a little unfocused. Perhaps rearrange it terms of goals and obstacles - A disgraced coach gets a second chance at success and love, but first they must deal with couch potato kid players, stiff competition, etc.

Aren't you giving away the ending??? Maybe say "as he pursues" or "in pursuit of" a championship trophy, etc.