Question: Charlie Williams was traded for someone nicknamed as what?
Sentence (from "Willie Mays"): Willie Howard Mays, Jr. (born May 6, 1931), nicknamed "The Say Hey Kid", is an American former Major League Baseball (MLB) center fielder who spent almost all of his 22-season career playing for the New York/San Francisco Giants, before finishing with the New York Mets.
Relevant evidence: Yes