Anderson's 63 set a course record at Carolina Country Club, while Clark's 62 is the new course record at Thornblade Club.
The near-perfect conditions led to plenty of low scores. Fabian Gomez and Dustin Bray came in at 8-under, while four others are at 7-under. Thirty players shot 5-under or better, and 132 of the 168 players shot par or better. Twenty-one players managed an entire round without a bogey.
The tournament features professionals paired with a celebrity partner in a three-day best-ball competition on three different courses. The 14 teams with the lowest scores advance to Sunday's final round.