The Caddyshack and Slap Shot followups were brutal.But there have been so many more.
"Fear Strikes Out" the 50's black and white Jim Piersall story movie starring Anthony Perkins had without a doubt the worst imaginable action scenes of an actor trying to look like a ballplayer. Piersall said he was appalled that a "fag" played him
and Kevin Costner really put the screws to Perkins [if I can say that] because of those scenes.
If you can imagine Norman Bates charging a ball in the outfield and throwing or swinging a bat then that is exactly how it looked. His throwing motion was about that of an average sixth grade girl's.