Kicking and Screaming.
The Natural
Little Giants
The Replacements
Necessary Roughness
Major League (ALL of them) (wow these last 4 have very similar plots)
Rad
Thrash'n
Jerry Maguire
Rocky IV & VI
Real Steal
Cutting Edge
National Anthem
Big Green
Sideout
(Wow had a hard time narrowing my list down, didnt realize there were so many awesome sports movies)