SI's Best Shirtless Covers

From: Sports Illustrated

Don King, 

Muhammad Ali 

and 

Joe Frazier

Sept. 15, 1975

Donald "Don" King (born August 20, 1931) is an American boxing promoter whose career highlights include promoting "The Rumble in the Jungle" and the "Thrilla in Manila". King has promoted some of the most prominent names in boxing, including Muhammad Ali, Joe Frazier, George Foreman, Larry Holmes, Mike Tyson, Evander Holyfield, Julio César Chávez, Ricardo Mayorga, Andrew Golota, Félix Trinidad, Roy Jones, Jr. and Marco Antonio Barrera. Almost all of them sued him for defrauding them; King settled most lawsuits for six- to eight-digit pay-offs while managing to avoid a conviction of felony fraud or time in jail.

Muhammad Ali (born Cassius Marcellus Clay, Jr.; January 17, 1942) is an American former professional boxer, generally considered among the greatest heavyweights in the sport's history. A controversial and polarizing figure during his early career, Ali is today widely regarded for the skills he displayed in the ring plus the values he exemplified outside of it: religious freedom, racial justice and the triumph of principle over expedience. He is one of the most recognized sports figures of the past 100 years, crowned "Sportsman of the Century" by Sports Illustrated and "Sports Personality of the Century" by the BBC.

Joseph William "Joe" Frazier (January 12, 1944 – November 7, 2011), also known as Smokin' Joe, was an American professional boxer, Olympic gold medalist and Undisputed World Heavyweight Champion, whose professional career lasted from 1965 to 1976, with a one-fight comeback in 1981.