Alsab (1939–1963) was an American Hall of Fame Thoroughbred racehorse.Alsab was voted the 1941 U.S. Champion Two-Year-Old Colt and in his three-year-old season in which jockey Basil James rode him to a win in the Preakness Stakes and second-place to Shut Out in both the Kentucky Derby and Belmont Stakes, he won 1942 U.S. Champion Three-Year-Old Colt honors.On September 19, 1942, Alsab defeated the 1941 U.S.