Phil Mickelson’s tee shot on No. 3 landed in the rough to the right, and when he arrived at his ball he saw a man sitting on the ground, holding an icepack to his right temple, with medical staff gathered around.

Mickelson went over and gave the man a glove and apologised. One problem: It was Sam Horsfield’s shot from the neighboring sixth hole that hit him. “It’s just instinct,” Mickelson said, drawing laughter from the gallery. “I would normally think it’s me.”