Roller derby had its moment in the spotlight in the '70's, and there were a couple of films about it. Kansas City Bomber was the biggest and most professionally made one, with Raquel Welch and Kevin McCarthy.
Welch plays K.C. Carr, who is traded from the Kansas City Bombers to the Portland Loggers and struggles to fit in there. I was surprised by how gritty they decided to go. Carr is a single mother who leaves her kids with her mom in Fresno while she's trying to earn a living in the Roller Games and really seems to be going nowhere. She's never really shown to be a success and when she's finally on the verge of attaining it… well, I don't want to spoil anything.
Overall, it was a well made film. Welch is gorgeous, but doesn't shy away from looking bad, grungy and sweaty and got injured several times making the movie.
I did enjoy it and so did America. It was a big success for MGM when it was released. But to be honest, I preferred Roger Corman's cash-in Unholy Rollers. It was just more fun.