The 51st Grey Cup took place on November 30, 1963, at Empire Stadium in Vancouver, British Columbia, and decided the Canadian Football League (CFL) champion for the 1963 season.
In 2011, Mosca and former Lions quarterback Joe Kapp had a physical altercation regarding the play at a CFL Alumni Association charity luncheon.
An irate Kapp then knocked Mosca down to the floor with a pair of punches and kicked him, before turning to the stunned attendance and shouting "Sportsmanship!
The event was captured on video by one of the attendees and became the object of significant media attention, in particular because of the 48-year gap between the original play and the altercation that stemmed from it.
Monday Night Football aired the fight footage in a pre-game segment, and Mosca appeared on Dr. Phil to discuss the feud.