David Frost fired a 6-under 65 on Sunday to cruise to a 5-stroke victory at the Toshiba Classic.

Frost, who entered the final round holding a 1-stroke lead, finished at 19- under-par 194 to tie a tournament record and capture his fourth career Champions Tour win.

Fred Couples carded a 2-under 69 during his final round at Newport Beach Country Club to take second place at 14-under, while Peter Senior (66) closed out his final round with an eagle at the last to grab a share of second place with Jay Haas (67) at 11-under.

Tom Watson (66) occupied fifth place at minus-10.

Frost quickly gave up his early advantage by opening his day with a bogey at the first, but he bounced back with four birdies over his next five holes to jump out to a 4-stroke lead.

Couples, meanwhile, parred his first six holes until he coupled a birdie at the seventh with Frost's 3-putt for bogey at the same hole to get back within two strokes.

After the two parred the next two holes, Couples cut further into his deficit with a birdie at the 10th, but then hit a tree at the 12th, resulting in a bogey.

"To be honest with you, I've never even seen that tree or worried about it. The pin was in the front, it hit the tree and bounced down and made bogey," Couples said.

Frost was never threatened from there as he rolled in back-to-back birdies at the 14th and 15th to move ahead by three strokes following Couples' birdie at the 15th.

Frost then closed his round with two more birdies at the 17th and 18th, while Couples traded a bogey at the 17th with a birdie at the last to secure second place.

"I wasn't hitting any bad shots out there," Frost said about not giving Couples a chance to take the lead. "It would have to be me hitting some bad shots and him hitting some real good ones, and I don't really think he was hitting his irons that well for the game to swing away from me and towards him, so I felt confident about my game out there."

The low round of the day belonged to Jim Rutledge, who carded a sizzling 9- under 62 to vault himself 43 places up the leaderboard. He finished at 8- under-par 205 to grab a share of eighth place with six others.

NOTES: Frost became the first wire-to-wire winner at this event since Nick Price in 2011 ... Craig Stadler, who carded an even-par 71 on Sunday, hit a hole-in-one at the 13th. It was just the third ace at the Toshiba Classic since 2006 ... Jay Haas set the course record in 2007 ... Couples won this event in 2010.