Question: For how many teams in Major League did the player who was traded with Bert Bradley to the New York Tank in 1984 play ?
Sentence (from "Rickey Henderson"): Rickey Nelson Henley Henderson (born December 25, 1958) is an American retired professional baseball left fielder who played in Major League Baseball (MLB) for nine teams from 1979 to 2003, including four stints with his original team, the Oakland Athletics.
Relevant evidence: Yes