Petrella v. Metro-Goldwyn-Mayer, Inc.
Raging Bull was a 1980 movie starring Robert DeNiro as boxer Jake LaMotta, based on LaMotta's memoir co-written with Petrella. LaMotta boxed from 1941 to 1954 and faced the famous Sugar Ray Robinson 6 times. You can see the final round of their final match here.
During the time LaMotta boxed, boxing was tied with baseball as the most popular sport for Americans. Today, boxing's popularity has waned and only 2% of Americans say that boxing is their favorite sport.