Marcus Allen's brother was born in the 1960s.
Damon Allen ( born July 29 , 1963 ) is a former professional quarterback who played in the Canadian Football League . Marcus LeMarr Allen ( born March 26 , 1960 ) is a former American football running back and football analyst for CBS . His younger brother , Damon Allen , played quarterback for 23 seasons in the Canadian Football League and was professional football 's all-time leader in passing yards .