“Usually when you’re around five under and leading after the first round, it tends to go to around the 10 to 15 under region.”
Woods sported a slightly longer putter at Harind Park than fans are usually accustomed to seeing.
After the opening salvo of his PGA Championship title defence, Brooks Koepka is a confident man.
Former world number one Jason Day and American Brendon Todd share the lead.
Koepka is part of a nine-strong group on four under in California.
Tiger Woods is also in the mix after an opening-round 68.
Koepka carded an opening four-under-par 66 to trail Jason Day by a stroke while Woods was two shots further back.
The American is targeting a third consecutive US PGA Championship title.
The Northern Irishman won the last of his four major titles in 2014.