Only two of the top 11 scores in the opening round came at Santa Ana.
Hebert, of Traverse City, Mich., is trying to become the first back-to-back winner since 1972 in the tournament for PGA club pros.
I wanted to get a good one in over here and it looks like that score is pretty good, Hebert said.
The six-way tie for second included Vince Jewell of Euless, Texas, who shot his 67 at Twin Warriors Golf Club, which played the tougher of the two courses and will be used for the final two rounds. Jewell was the only player at 67 who will play Monday at Santa Ana.
The 312 players will be pared to the top 70 for the final two rounds. The top 20 finishers are eligible for the PGA Championship at Hazeltine National Golf Club in August.