A team full of talented people lose to a below average team due to teamwork, so they hire the other teams coach.

The main thing is, your lead should have a personal goal
Your character should have lost something personal, like his girlfriend.
Now in order to get her back he and the good looking team hire the washed up coach of the underdog team believing if he wins the championship he will get the girl back,
Only to realize she left him because he did not treat her right, it wasn't about winning all along it was about who he was. (He was a jerk before now he has to grow into a better person)

I looked back to a previous logline I had written, Your story is different because it is about hiring a new coach but It may serve as an example
?When he discovers his father will be fired as coach if he doesn't bring home a championship, a popular quarterback must rally his good looking and talented team to beat the scruffy, overachieving, underdogs that, every year seem to defeat them in the final game.? -Overdogs-

I looked back to a previous logline I had written, Your story is different because it is about hiring a new coach but It may serve as an example
?When he discovers his father will be fired as coach if he doesn't bring home a championship, a popular quarterback must rally his good looking and talented team to beat the scruffy, overachieving, underdogs that, every year seem to defeat them in the final game.? -Overdogs-