Sugar Ray Robinson stands over Bobo Olson after a knockdown as referee Mushy Callahan moves Robinson back on May 18, 1956 at Wrigley Field in Los Angeles.
Sugar Ray Robinson clinches with Gene Fullmer on Jan. 2, 1957 at Madison Square Garden in New York City.
Sugar Ray Robinson and Gene Fullmer appear on the cover of the April 29, 1957 issue of Sports Illustrated.
Sugar Ray Robinson looks at Gene Fullmer after a knockout on May 1, 1957 at Chicago Stadium.
Sugar Ray Robinson fights Carmen Basilio on Sept. 23, 1957 at Yankee Stadium in the Bronx, N.Y.
John G. Zimmerman
Sugar Ray Robinson fights Gene Fullmer on March 4, 1961 at the Las Vegas Convention Center.
Sugar Ray Robinson walks with Muhammad Ali (then known as Cassius Clay) during the weigh-in for Ali's fight against Sonny Liston on Feb. 25, 1964 at the Cypress Room of the Miami Beach Convention Hall.
Sugar Ray Robinson fights Stan Harrington on Aug. 10, 1965 at International Center Arena in Honolulu.
Sugar Ray Robinson and Stan Harrington appear on the cover of the Sept. 6, 1965 issue of Sports Illustrated.
Muhammad Ali plays with the hair of his childhood idol, Sugar Ray Robinson, before Ali's bout with Joe Bugner on Feb. 14, 1973 at the Las Vegas Convention Center.