2021 U.S. Open scores: Phil Mickelson off to rough start as cell phone noise knocks him off game

Seeking the ever-elusive career grand slam at the 2021 U.S. Open, Phil Mickelson on Thursday found himself distracted on numerous occasions by cell phone noise in the gallery. Mickelson was particularly irked on hole No. 13 after hearing a phone, as he was seen backing away from his shot in frustration. He eventually asked that phone to be put on silent, and an officer on site was summoned to address the distraction.