INCHEON, South Korea — Phil Mickelson has played 49 matches in the 21 years since the Presidents Cup began.
And he learned something new Friday.
For starters, Mickelson was not aware of the one-ball rule in fourballs and singles matches, meaning that players can't change the model of their golf ball during the match. He also didn't realize that a match could go from all square to 2 up in just one hole.
"That's the first time I've ever heard of that happening," he said.
It turned out to be a costly mistake when Mickelson and Zach Johnson halved their fourballs match with Jason Day and Adam Scott, and that allowed the International team to pull within one point of the Americans going into Saturday.