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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.
Why did Martin Kaymer turn down a chance to become a full PGA tour member in 2011?
Martin Kaymer stated he would concentrate on the European Tour for 2011, but would play several U.S. events as well.

Question: Are there any other interesting aspects about this article?
Self-contained rewrite: Is there any other interesting aspects about Martin Kaymer becoming the world's No. 1 ranked player in 2011 besides why he chose to turn down becoming a full PGA Tour member?