The year is 2018 in a futuristic society where corporations have replaced countries. A violent futuristic game known as Rollerball is the recreational sport of the world, with teams representing various areas. One player, Jonathan E. (James Caan), fights for his personal freedom and threatens the corporate control.
- James Caan as Jonathan E.
- John Houseman as Mr. Bartholomew
- Maud Adams as Ella
- John Beck as Moonpie
- Moses Gunn as Cletus
- Ralph Richardson as The Librarian
- Pamela Hensley as Mackie
- Barbara Trentham as Daphne
- John Normington as Ballard, executive
- Shane Rimmer as Rusty, team executive
- Robert Ito as Connor, strategy coach for Houston team
- Burt Kwouk as Japanese Doctor
- Nancy Bleier as Girl in Library
- Richard LeParmentier as Bartholomew's aide