Dutchman Joost Luiten was penalized during the Sunday completion of the third round of the PGA Championship for double-hitting a putt.
As Luiten was trying to clean up a tap-in putt at the 16th hole, he struck the ball while gripping the putter with one hand. After striking the ball the heel of the putter scuffed the ground, causing the blade to hit the ball again.
Under Rule 14-4 of the Rules of Golf, Luiten was required to count the first stroke, then add a penalty stroke. He assessed the penalty on himself after reviewing video evidence following the round, but before signing his scorecard.
In the end, he correctly signed for 3-over 75. He trails Rory McIlroy by 10 shots entering the final round.