Matteson and Campbell lead in Las Vegas

Troy Matteson maintained joint leadership of the Justin Timberlake Shriners Hospitals for Children Open in Las Vegas after posting a second-round 67 at TPC Summerlin.

Matteson held the overnight lead after a first-round 62, and although his performance dropped off a little today, he remains at the top of the order heading into day three.

The 29-year-old was joined on 13-under by Chad Campbell, who closed with an eagle on the ninth to sign for a bogey-free 62.

Matteson's four-under-par round today moved him to 129 for the tournament and maintained his solid displays in Fall Series events.

A winner at TPC Summerlin in 2006, Matteson has had six further top-10 finishes in his last 12 Fall Series events, and is again revelling in the late-season schedule.

"I've always liked the fall, maybe it coincides with the start of school every year for me when I was in college," said Matteson, who recovered well from bogeys on the 11th and 14th to hit four birdies after the turn.

"I wasn't much of a summer golfer. I didn't play good in the summer."

He added that his 2006 victory has boosted his confidence this weekend, saying: "It does give me a lot of confidence to know that when I was hitting it good, what I could get done, and hopefully I could do something similar this week."

Scotland's Martin Laird was again the only non-American inside the top 10 and was locked in a four-way tie for third place on 12-under with Ryan Moore, Bob Heintz and Matt Kuchar.

Tom Pernice Jnr, who shared the first-round lead with Matteson and Spencer Levin, shot a 69 to drop to 11-under, alongside Jim Furyk, PGA rookie Rickie Fowler and Scott Piercy.

Levin shot a level-par 71 to stay on nine under for the tournament.

The cut was set at four-under 138 and claimed 73 victims, among them reigning champion Marc Turnesa, Anthony Kim, Rory Sabbatini and Brian Davis.