Conversation so far:
What sport did Martin Kaymer play?
Martin Kaymer is a professional golfer; winner of two major championships, he was also the No. 1 ranked golfer in the Official World Golf Ranking for eight weeks in 2011.
What happened to Martin Kaymer in 2011?
Entering the 2011 season, Martin Kaymer turned down a chance to become a full PGA Tour member; he had gained exempt status with his win in the PGA Championship.

Question: Why did he turn it down?
Self-contained rewrite: Why did Martin Kaymer turn down a chance to become a full PGA tour member in 2011?