Hard to pick just one, but here is mine:
Here Come The Tigers was a BLATANT "Bad News Bears" ripoff from the late 70s...the Tigers were a team of misfits and castoffs that went from being the laughingstock of the league to winning the title (within the typical 10-12 game season)...the team included a Kelly Leak ripoff (juvenile delinquent turned super athlete), an Amanda Whurlitzer ripoff (although this one was more sex object than athlete), a Timmy Lupus ripoff (nosepicker who starts squeezing a tennis ball to develop strength)...but the worst part was this Japanese kid who, when he was at bat, wouldn't use the bat; he would instead "karate chop" the ball (NOT legal in real baseball btw)...Jeebus, talk about stereotyping...also, there was a deaf kid on the team and he inspired everyone to be understanding and all that bullshit.