DeChambeau has yet to win against the 48-man fields on the Saudi-backed LIV Golf League, and this might be his best chance. He played bogey-free for the day, and his eagle allowed him to move into the lead going into the third and final round.
Gooch, who won back-to-back LIV Golf events in Australia and Singapore earlier this year, had the lead for much of the second round at Valderrama, with eight birdies against one bogey. But then he took a second bogey on the 18th hole and finished with a par for a 65.
Johnson shared the opening-round lead but could only manage a 71, leaving him five back. Jason Kokrak was a late arrival due to travel from Ohio and was tied for the 18-hole lead with Johnson. He shot 74 and fell eight shots behind.
DeChambeau was at 9-under 133.