These foster children were the protagonist (and the protagonist's best friend) in AITO. Coach George Knox's called them his "Good Luck Charms".
Roger & JP

In TN, Robert Redford played this rising baseball star who's career was initially cut short by a gunshot, but ultimately returned to glory in 1930's baseball.
Roy Hobbs

Charlie Sheen's character's name in ML was Ricky Vaughn, but he was better known by this nickname due to his pitching 'control issues'
Wild Thing

Kevin Costner plays a veteran catcher who is recruited to the Durham Bulls to help fine tune an up & coming pitching talent, what was his character known as...
Crash Davis
In A League of Their Own (ALoTO), Geena Davis plays the protagonist, while Tom Hanks plays her initially antagonistic manager who later becomes her mentor. What are the names of their characters?
Dottie & Jimmy Dugan