This Day in Golf History: July 23

Mark Calcavecchia won a playoff with Australians Greg Norman and Wayne Grady on this date in the 1989 Open Championship at Troon. It was the first time the championship used a four-hole aggregate playoff to determine the winner. The three had tied at 13-under 275. Calcavecchia handily won the playoff at two under; Grady was one over and Norman's score was an X.