He made a 20-foot putt on his final hole to become the 10th player in tour history to break 60. Jim Furyk set the record with a 58 in the final round of the Travelers Championship in 2016.
This is the third consecutive year the PGA Tour has had a sub-60 round. Snedeker is the first to shoot 59 since Adam Hadwin in the third round of the 2017 Careerbuilder Challenge.
It gave him a four-stroke lead after one round. Ryan Moore and John Oda shot 63s, and Martin Flores, D.A. Points, Brett Stegmaier, David Hearn, Abraham Ancer, Ollie Schniederjans and Jonathan Byrd had 64s.