I absolutely love Field of Dreams. I think it’s right up there with Raging Bull, Hoosiers, Rocky, and Bang the Drum Slowly (an early ‘70s film with Michael Moriarty and Robert DeNiro about a baseball player diagnosed with cancer) among the best sports films of all time.
Eight Men Out is good, too, and the original Major League was fun (albeit not as good as Bull Durham). I never cared much for The Sandlot. Rookie of the Year was an abomination (”horrendous piece of crap” does not do it justice); my brother liked “Little Big League” (about the pre-teen who manages a major-league team) and I used to think that he was talking about Rookie of the Year, but it’s a different (and far better) film.
DeNiro is a flaming leftist, but he was phenomenal in that one (The Deer Hunter too).