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Did Martin Kaymer win an event in 2014?
In May 2014, Martin Kaymer earned a wire-to-wire win at The Players Championship in Ponte Vedra Beach, Florida
What was Martin Kaymer's score at The Players Championship in 2014?
Martin Kaymer won The Players Championship in 2014 finishing −13.

Question: Has he won a US Open?
Self-contained rewrite: Has Martin Kaymer won a US Open?