On the seventh tee at the Jack Nicklaus Golf Club Korea, Mickelson and Johnson were all square in their match against world No. 2 Jason Day and Adam Scott when Mickelson reached into his pocket and pulled out a different model ball than the one he started the match with and swung away. A few moments later, Mickelson found out he violated the One-Ball Condition of the rules, which states a player must use the same model of golf ball throughout the match that he started with on the first hole.

The penalty for this breach is a one-hole adjustment in the match.

But that wasn't the end of things......
http://www.usatoday.com/story/sports...-day/73636020/