Phil Mickelson has been a different kind of relaxed this week at the Masters Tournament. He's taken his youngest daughter to coffee shops to play chess and stayed up past midnight watching movies with his family.

He looked loose Sunday afternoon before his final round. The first patron to extend his fist for a bump was rewarded.

With Mickelson's family joining him at a tournament for the first time this year and a gallery cheering his every shot, Mickelson harnessed a wave of support and emotion to record a bogey-free final-round 67 and win his third green jacket. Mickelson fired 67s both days of the weekend to best the field by three shots at 16-under-par.

He recorded only two bogeys over his final 27 holes.

"His demeanor was completely different," said Butch Harmon, Mickelson's swing coach. "He was more relaxed."

Mickelson made par on 10 of the first 11 holes, including seven in a row. This conservative start did little to quiet his following. Many of his pars were exciting, swashbuckling affairs, including one-putt efforts on Nos. 5, 9 and 10.

Mickelson owned the crowd during the final round, save for a sprinkling of exuberant, sunburned Brits rooting for eventual runner-up Lee Westwood to become the first English winner since Nick Faldo (1996).

Patrons tossed encouragement toward Mickelson -- "It's your day, Phil," or "Everyone loves you, Phil," -- before he had even descended the hill that leads away from the first tee.

Clusters of them gave Mickelson a sustained ovation for just about anything, including when he emerged from the bathroom between the fifth and sixth holes.

Mickelson's mother, Mary, and father, who is also named Phil, lingered on a bluff above the left side of the fifth fairway, chatting with friends and reveling in the sunlight. They eased down the hill to watch their son make a two-putt par from about 12 feet on the par-3 sixth hole.

He grabbed the lead for good a half-dozen holes later, when he stuck a 9-iron to 20 feet on the tricky par-3 12th and rolled the putt back toward the water and into the cup.

Mickelson made the last of five birdies on No. 18, then wrapped his arms around his wife, Amy, who, like his mother, has been diagnosed with breast cancer.

"I was just really glad she was there," Mickelson said. "To walk off the green and share that with her is very emotional for us."

Said caddie Jim "Bones" Mackay, "I didn't want to look up, because I knew I would get choked up if I saw her. It was great to see her there."

Mickelson said his family came here Tuesday night, two days after he had arrived to prepare for his first win since September. They will leave together after his fourth major championship, one he said will remain with him a long time.

"I'll cherish every moment of this week," Mickelson said. "This has been a very special week."

Reach Matt Middleton at (706) 823-3425 or matt.middleton@augustachronicle.com.