I didn’t know this in a trivia contest. The man was Dan Bankhead, who made four relief appearances for the 1947 Dodgers. (The legendary Satchel Paige was the first black pitcher in the American League.)
Although Bankhead was not especially successful on the mound that year (7.20 ERA), he did manage to homer in his first at bat, and he did get into the World Series that year – as a pinch runner. An interesting question might be: How did a guy with a 7.20 ERA in four meaningless relief appearances get selected for the World Series roster?
Anyway, Bankhead labored in the Mexican leagues in his last 13 summers in pro ball, where he occasionally managed and was fairly successful as a two-way player well into his 40s.