Phil Mickelson's Mistake at the 2015 Presidents Cup Cost Two Holes

During the 2015 Presidents Cup held in South Korea, Phil Mickelson made a significant error that resulted in the loss of two holes in a match against Jason Day and Adam Scott. Playing alongside Zach Johnson, Mickelson switched his ball model mid-match, unaware that this was against the rules.

This infraction allowed the international team to take a one-hole lead. Subsequently, a decision by the rules committee disqualified Mickelson from the hole, leaving Johnson to compete alone, which led to another hole loss. The pair entered the seventh hole even but ended up two down due to these rulings.

After the match, the committee acknowledged their mistake, stating that Mickelson should have been allowed to continue playing the hole. Despite this, the decision stood as the match concluded. Team USA managed to secure a half point, but the incident highlighted the importance of understanding the rules, as Mickelson noted that the one-ball rule was not enforced in Ryder Cups held in the U.S.