American Hunter Mahan and Welshman Jamie Donaldson incurred two-stroke penalties for playing each other's ball during the second round at the US Open on Friday.
The mistake was particularly costly for Mahan, who seemed likely to miss the cut by just one stroke at Pinehurst No. 2 where half the field was yet to complete the second round.
The mix-up occurred at the par-four 18th, where the players failed to identify their respective balls before hitting their second shots. It was not until they reached the green that they realised their mistake.Read More »from Mahan and Donaldson in ‘crazy’ ball mix-up at US Open