From the back cover:
Rollerbrawl is a simple and easy combat game for role players and the psychopathic who love sports and man to man combat.
From the inside:
Rollerbrawl is a fast game of tactical sports mayhem in the near future. Players set up and play a team of variable abilities, and try to score points by putting an unbalanced, 8-inch ball of foam coated with hard rubber through one of two concentric hoops. If they're lucky most will survive the game...
"New and Improved" Second Edition was published in 1984