Which actor from the 1973 American film The World's Greatest Athlete also appeared in "The Mary Tyler Moore Show" and "Roots"?
The World's Greatest Athlete:  It starred John Amos, Roscoe Lee Browne, Tim Conway, Dayle Haddon, and Jan-Michael Vincent. John Amos:  Amos' other television work includes roles in "The Mary Tyler Moore Show", the miniseries "Roots", for which he received an Emmy nomination, and a recurring role as Admiral Percy Fitzwallace on "The West Wing".
John Amos