Phil Mickelson completed a wire-to-wire victory in the Phoenix Open in Scottsdale, Ariz., again flirting with history in a dominating four-day run.

Mickelson shot a 4-under-par 67 Sunday to finish at 28-under 256, two strokes off the PGA Tour record of 254 set by Tommy Armour III in the 2003 Texas Open.

‘‘It’s an important one for me, because it’s been a while since I won, been a while since I've been in contention,’’ Mickelson said. ‘‘I was certainly nervous heading into today. I think the thing I'm most excited about was the way I was able to regain control of my thoughts after a few shots early on that I didn’t care for.’’

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Mickelson missed a chance for a 59 in the first round when his 25-foot birdie putt on the final hole caught the right edge of the cup, curled 180 degrees, and stayed out. He settled for a 60 and followed with rounds of 65 and 64 to take a six-stroke lead into the final round.

‘‘I think that sets up the tone for the rest of the year, because I really started to play well,’’ Mickelson said. ‘‘But for me, the rest of the year took a turn on Tuesday when I got my new driver. It just changed my whole deal.’’

Brandt Snedeker finished second, four strokes back after a 65. Scott Piercy (61) finished third at 23 under and Ryan Moore (65) was fourth, another stroke back.

Mickelson took a three-stroke lead to the 17th tee, and nearly drove into the left-side water on the drivable par 4, his ball stopping a yard short of the hazard. He hit his 25-yard second shot 15 feet past the hole and made the birdie putt. Snedeker matched him with a little shorter putt to remain three shots behind.

Mickelson parred the par-4 18th after another drive to the left, one that easily cleared the water he hit into Friday en route to a double bogey. Snedeker closed with a bogey.

Mickelson had his third wire-to-wire victory and first since the 2006 BellSouth Classic — a 13-stroke blowout the week before the second of his three Masters victories. He pushed his victory total to 41, winning for the first time since 51 weeks ago at Pebble Beach.

Making his 24th appearance in the event that he also won in 1996 and 2005, Mickelson tied the tournament scoring record set by Mark Calcavecchia in 2001, and joined Calcavecchia, Arnold Palmer, and Gene Littler as the only three-time winners. With six victories in Arizona, Mickelson also matched Johnny Miller’s tour record.

European — Stephen Gallacher holed an eagle on No. 16 and won the Dubai Desert Classic in the United Arab Emirates, overcoming early jitters to beat playing partner Richard Sterne (71) by three shots.

Gallacher (71) finished with a 22-under total of 266 to take his second tour win and the first since 2004.

Felipe Aguilar (69) and Thorbjorn Olesen (71) finished five shots back in a tie for third. Eighth-ranked Lee Westwood (68) and Marcus Fraser (67) were another back.

European Ladies — Karrie Webb won her eighth Australian Ladies Masters title, coming from two strokes behind to edge Chella Choi (69) in the final round with birdies on three of her last five holes for a 5-under 67 and a two-stroke victory at Gold Coast.

Webb, 38, finished at 13-under 203 in the 54-hole tournament, the season opener on the tour. Her eighth win in the same tournament matches the PGA Tour record of Sam Snead, who won the Greater Greensboro Open eight times.