The 51-year-old began the final round in a tie for 12th, four shots off the lead, but an equal-best Sunday round of 6-under 66 proved to be enough.

Pampling, playing five groups ahead of the final trio at Snoqualmie Ridge, set the clubhouse lead at 12-under 204 which proved good enough.

"There is so much pressure getting that first win and to finally get it done is great," Pampling told Golf Channel immediately after his win was confirmed.

"Obviously getting to Hawaii next year was one of the goals I set for myself and I'm looking forward to trying to get the (Charles) Schwab Cup now."

Jim Furyk and overnight leader Woody Austin both had a shot at forcing a playoff but failed to get up-and-down for birdie from greenside bunkers on the par-5 18th.

Rod Pampling fired a 66 to collect his first Champions Tour title. PHOTO: Getty Images.

Pampling won three times on the PGA Tour, the last in 2017 in Las Vegas, and has two PGA Tour of Australasia wins including the 2008 Australian Masters.

His latest victory means Rodger Davis, at the 2003 Toshiba Senior Classic, is no longer the most recent Aussie victory in the men’s senior ranks on US soil.

Peter Senior finished runner-up on five occasions including three times in 2011 alone.

"It's fantastic," Pampling said.

"You look at all the Hall of Famers are just phenomenal out here.

"There's so many and they still play really good golf, which people think they don't, but I'll tell you what, they play so good.

"It's just not quite as far off the tee anymore, but everything else is still really good.

"To get a win you've got to play good and thankfully I did today."

Furyk (70) dropped a stroke with a bogey on the par-3 17th.

He hit left into a greenside bunker on 18, sent his third across the green nearly to the fringe and missed a 20-footer for birdie to finish in a three-way share of second – with Tim Herron (67) and Billy Mayfair (69).

Austin (72) took two shots to get out of a right-side bunker and made a bogey to drop to 10 under and a tie for fifth at 10 under – with Alex Cejka (66).

Pampling opened eagle-birdie, birdied the 7th and 9th, bogeyed the 10th, birdied holes 11, 12 and 14 and bogeyed the 16th.

He made two clutch par saves on 17 and 18 that proved decisive.

"Just obviously come out of the gates quick, eagle-birdie start, that sort of got me right there," Pampling said.

Colin Montgomerie, playing in the final group with Furyk and Austin, shot a 74 to tie for 11th at 7 under.