SOUTHAMPTON, Bermuda (AP) ― Martin Kaymer is making a habit of beating Bubba Watson in head-to-head situations, even at an exhibition of major champions in Bermuda. Kaymer won the PGA Grand Slam of Golf on Wednesday by surviving a wild day of lead changes. The U.S. Open champion won on the first playoff hole at Port Royal by making a 10-foot birdie and then watching Watson miss his birdie putt from 4 feet.