Wilson's Allen sired a total of 482 foals. Among them were five of the first ten World Grand Champions: Strolling Jim, winner in 1939; Haynes Peacock, winner in 1940 and 1941; Melody Maid, winner in 1942; City Girl, winner in 1944; and Midnight Sun, winner in 1945 and 1946. It is estimated that of the nearly 70 horses who have won the World Grand Championship, only three do not trace in a direct line back to Wilson's Allen.
