San Francisco, CA (SportsNetwork.com) - Peter Senior fired an 8-under 63 on Thursday to claim the early lead at the Charles Schwab Cup Championship.
Senior is seeking his first career win on the Champions Tour.
"Today I only missed a couple of shots. I made bogey out of the ones that I missed, but probably the best round of golf that I've played this year. I putted well and I played well," Senior said about his round.
David Frost shot a 7-under 64 during his opening round at TPC Harding Park to sit alone in second place, while Fred Couples owns third following his 65.
Mark O'Meara is in fourth at 5-under 66, a shot ahead of Bernhard Langer, Steve Elkington and Duffy Waldorf.
Langer is the lone player in the field who can challenge Charles Schwab Cup points leader Kenny Perry for the cup.
Perry, who carded a 3-under 68 to claim a share of eighth place, will win the cup with at least a solo fifth-place finish, while Langer needs to win the tournament and have Perry finish in a five-way tie for fourth or a two-way tie for fifth to win the cup.
Senior opened his stellar round with back-to-back birdies at the first and second before tripping to a bogey at the third.
He bounced right back with a birdie at the fourth, and then added consecutive gains from the sixth to reach 4-under. An eagle at the ninth from outside 10 feet moved him to 6-under at the turn.
The Australian reached 8-under with another pair of birdies at the 11th and 12th. He traded bogeys at the 13th and 15th with birdies at the 14th and 16th to remain there before parring his final two holes to grab the clubhouse lead.
"It's just nice, it doesn't matter when it is to put a round together like this. The course is fairly long for me, I've got long irons into a lot of these par 4s," said Senior.
Frost, meanwhile, was 7-under through 12 holes to sit a stroke off Senior's pace.
Frost reached that number thanks to a sizzling front nine that included three straight birdies from the second before he closed his outward 30 with three gains in a four-hole stretch from the sixth.
After parring his next two holes, he converted a lengthy birdie effort at the 12th to move to 7-under and within a shot of the lead.
But he could not meet Senior atop the leaderboard as he parred his final six holes to finish a shot off the pace. Frost had a chance to claim a share of the lead with a 10-foot birdie putt at the last, but he just missed to the left.
Couples countered a double bogey and a bogey with nine birdies to move into third place.
NOTES: Defending champion Tom Lehman carded a 2-under 69 during his first round and sits in a share of 14th place ... Perry, who has won three events this season including consecutive majors at the Constellation Senior Players Championship and U.S. Senior Open Championship, leads the Charles Schwab Cup standings by 612 points over Langer.