California - Boo Weekley birdied his final hole on Thursday to join Venezuelan Jhonattan Vegas atop the leaderboard after 36 holes of the five-round, five million-dollar Bob Hope Classic.
Weekley carded a six-under 66 while Vegas carded a 67 for a 13-under total of 131.
"It's good to be hitting the ball well and putting well, especially on a course like these ones where you've always got a lot of birdie opportunities," said Vegas, who played at the University of Texas before excelling on the Nationwide Tour last year.
Vegas, who is playing in just his fifth US PGA Tour event, bogeyed his final hole on the Nicklaus Private course, one of four courses in use for the tournament.
Moments later Weekley birdied the same hole - the par-four ninth - to cap his round, giving thanks for his new putter.
The two were one shot in front of Charles Howell, who carded a 66 on the Palmer Private course, and Chris Couch, who posted a 65 at SilverRock for 132.
England's Brian Davis (66) and Keegan Bradley (67) were on 133 in a tournament that is so far living up to its tradition as a birdie festival.
Vegas didn't speak much English when he moved to the United States eight years ago. He became the first Venezuelan to earn a PGA Tour card last year.
Weekley made birdie on his final two holes on Thursday. He switched putters this week and it is paying off.
"To 12 feet, 15 feet, I feel like I can make it," Weekley said. "I would say for about the last year, I ain't felt that in a while. I was hoping that this would happen."
Leading second-round scores on Thursday from the five-round, US PGA Tour Bob Hope Classic (USA unless noted):
131 - Jhonattan Vegas (VEN) 64-67, Boo Weekley 65-66
132 - Chris Couch 67-65, Charles Howell 66-66
133 - Keegan Bradley 66-67, Brian Davis (GBR) 67-66
134 - Greg Chalmers (AUS) 67-67, Jeff Overton 69-65, John Senden (AUS) 66-68, Peter Tomasulo 66-68, Cameron Tringale 67-67, Gary Woodland 65-69
135 - Ricky Barnes 65-70, David Duval 68-67, Fredrik Jacobson (SWE) 65-70, Jerry Kelly 67-68, Daniel Summerhays 69-66
136 - Alex Cejka (GER) 69-67, Martin Laird (GBR) 68-68, Rory Sabbatini (RSA) 70-66
137 - Stephen Ames (CAN) 69-68, Steve Elkington (AUS) 68-69, Ryuji Imada (JPN) 66-71
138 - Matt Jones (AUS) 67-71
139 - Chris Baryla (CAN) 69-70, Brendon de Jonge (ZIM) 68-71
141 - Matt McQuillan (CAN) 65-76
142 - Nathan Green (AUS) 68-74, Jarrod Lyle (AUS) 70-72, Nick O'Hern (AUS) 68-74
143 - Rod Pampling (AUS) 71-72, Jesper Parnevik (SWE) 73-70
144 - Fabian Gomez (ARG) 67-77
147 - Bio Kim (KOR) 71-76, Mike Weir (CAN) 72-75