Unheralded Englishman Richard Bland and Russell Henley are top of the standings heading into the weekend in San Diego.
Jon Rahm was through 13 holes when day two of the PGA Tour event was suspended on Friday.
Play was suspended on day one due to thunderstorms, but Collin Morikawa managed to set the early pace.
Phil Mickelson steadied himself on the closing holes to take a one-stroke lead into the final round at the US PGA Championship.
Louis Oosthuizen matched Phil Mickelson at five under par to share the lead at the US PGA Championship.
Corey Conners set the early pace in South Carolina, where some of the big names struggled on Thursday.
The US PGA Championship got up and running on Thursday, with the first group teeing off at 07:00 local time in South Carolina.
The US PGA Championship starts at Kiawah Island on Thursday and Stats Perform's expert writers pick out their favourites for glory.
Lee Kyoung-hoon earned a US PGA Championship berth after becoming a winner for the first time on tour.
In search of his second win in as many starts, Sam Burns holds a one-stroke lead at the AT&T Byron Nelson.