Perhaps if you give a little more background as to what you’re specifically looking for? “I’m researching baseball in movies” is about as ambiguous as saying “I might be a little bit pregnant.”
My Baseball Movie Rankings
1. The Natural (By far the best!)
2. Field of Dreams
3. The Sandlot
I haven’t seen Pride of the Yankees, or a few of the others mentioned here, but I will probably watch them sometime. I like baseball, and I like it as a framework for telling stories too.
There is a baseball scene in one of the Naked Gun comedies, where the leading guy is disguised as the umpire or something. That may get overlooked because it is not a baseball movie, but it could be relevant to your research.