Conversation so far:
What was special about Dick Williams' playing career?
Initially an outfielder, Dick Williams separated a shoulder making a diving catch early in his career, weakening his throwing arm.
What positions did Dick Williams play in the MLB?
Dick Williams learned to play several positions (he was frequently a first baseman and third baseman) and became a notorious bench jockey in order to keep his major league job

Question: who did he play for?
Self-contained rewrite: Who did Dick Williams play for in the MLB?