(CNN) -- Steve Stricker fired a 10-under-par round of 62 to overhaul Pat Perez for the lead after four rounds of the Bob Hope Classic in California.
Stricker followed up Friday`s superb 61 with 10 more birdies to turn a two-stroke deficit to Perez into a three-shot advantage over his fellow American and lead the field on 33-under-par.
Over the past two rounds, Stricker has recorded 21 birdies without dropping a shot.
After picking up four shots on the front nine, Stricker recorded consecutive birdies at the 12th and 13th before finishing his round with four in a row.
Perez, meanwhile, played his first nine holes in two-under to open up a three-stroke cushion.
He sank three more birdies coming home to conclude a bogey-free round of 67 but it was not enough as Stricker eclipsed the 32-year-old.
Making the 113th start of his career, Perez is bidding for his first PGA win.
The American enjoyed a scintillating opening as he set a PGA record for the best 36-hole start to a tournament by carding 19 birdies and an eagle in rounds of 61 and 63.
Robert Garrigus, Bubba Watson and Vaughn Taylor were tied for third at 26-under in a 90-hole event being played over four courses.