By Mike McAllister, PGATOUR.COM

FORT WORTH, Texas -- Pat Perez withdrew during Thursday's first round of the Crowne Plaza Invitational at Colonial with a shoulder strain.

Perez, who started his round off the 10th tee, had played seven holes and was 2 over when he withdrew after making a par at the par-3 16th.

"He said he hurt his neck last week at the (HP Byron Nelson Championship) and he was in pain," said playing partner Brendon de Jonge. "You could see from the start. He tried to play through, but you could see he was hurting."

Perez was making his ninth career start at Colonial. He also had to withdraw in this event 10 years ago after the first round.

Perez enters the weekend two shots off the lead at Harbour Town. (Lecka/Getty Images)

By Brian Wacker, PGATOUR.COM

HILTON HEAD ISLAND, S.C. -- After a double bogey on the 16th hole Friday at Harbour Town, the old Pat Perez might have continued his slide and bogeyed his way in.

But this is the cooler, calmer Perez, who has been working this season with mental coach Chris Dorris in Phoenix.

The idea, Perez said, was to try to turn negatives into positives.

"It's hard, especially for me, because I've done it my whole life," Perez admitted. "But to say, 'That's not going to bring me down, let's try to make 5 instead of 6.' And the next hole it's basically done."

It worked Friday.

Perez parred each of his next two holes to shoot 71 and enters the weekend just two shots off the lead.

"I'm trying to stay level, which is always, for me, trying to stay on a high," Perez continued. "I've really worked hard on it this year. I don't have the ups and downs."

That was evident in more than just Friday's round, too.

After a double-bogey 7 on No. 5 in the opening round, Perez made par on the next hole. He then went on to make five birdies on the back nine to close in 31.

"I didn't really let it affect me," said Perez, who'd hit his second shot into the water on the 540-yard hole. "I just kind of laughed at it. I couldn't believe somebody could play a hole that bad and I did."

The rest of them, he played well.

Perez hit 11 of 14 fairways in each of the first two rounds and has just 52 total putts to go with 13 birdies so far.

Said Perez: "I didn't think I'd make a lot of birdies, but I seem to be hitting it closer than I ever have out here."

And staying calmer than ever when he hasn't.

In the opening round of the 2013 RBC Heritage, Pat Perez hits his tee shot to 2 feet on the 181 yard, par-3 fourth hole and taps in for birdie.

Stan Badz/PGA TOUR

To preview the 2013 PGA TOUR season, PGATOUR.COM is counting down the Top 100 Players to Watch in 2013. For an archive page with the top 100 players and for an explanation on how the list was compiled, click here .

MORE TOP 100: Back to No. 73 | Forward to No. 71 | Top 100 archive

2013 PREVIEW: Pat Perez's scoring average improved nearly half a stroke in 2012 yet he only had one top-10 finish, his lowest total in the last six years. Statistically, he was strikingly similar in driving distance, GIR and strokes-gained putting so figuring out why he didn't contend more often will be key next season.

2012 DEFINING MOMENT: His low round was a 63 on Sunday at the Humana Challenge in partnership with the Clinton Foundation but it followed a 74 that was Perez's season in a nutshell. He did shoot three rounds in the 60s at the HP Byron Nelson Championship where the Arizona State product tied for ninth. –- Helen Ross, PGATOUR.COM

ALBERS’ QUICK TAKE: Pat plays with emotion and I can’t tell you if that helps or hurts him. I have seen him get mad and turn that anger into birdies. I have also seen it go the other way. Pat is an entertaining player to watch, he laughs a lot on the course and also shows frustration. You never have to guess his mood. One thing never in doubt, is his athletic ability. He is a very talented player. -- Fred Albers, SiriusXM PGA TOUR Radio

BOLTON’S FANTASY OUTLOOK: Logged eight of his nine top 25s by the first weekend in June, but would go on to earn just $1.064 million. Since establishing himself on the PGA TOUR, he's never really had to worry about his status, but he hasn't blown us away in salary games, either. Limit to his proven supporting role. -- Rob Bolton, PGATOUR.COM Fantasy expert

SOCIAL MEDIA: Find him on Twitter | Facebook

2012 QUICK REVIEW

Regular Season ranking 72nd

Final Playoffs ranking 54th

NOW IT’S YOUR TURN

What is your prediction for Pat Perez in 2013? Fill out the form below and let us know.

Cannon/Getty Images

Rory McIlroy led the field in driving distance at the PGA with 311.5 yards.

By John Schwarb, PGATOUR.COM

Rory McIlroy romped to an eight-shot win at the PGA Championship thanks to some game-sharpening in the last few months with swing coach Michael Bannon and putting advisor Dave Stockton. A swing that had gotten just loose enough was tightened, and we saw the results.

The results were also helped by some key tweaks in his Titleist arsenal.

McIlroy led the field in driving distance at Kiawah Island with an impressive 311.5-yard average, all with a Titleist 913D3 prototype driver. McIlroy was first fit for the new driver last month at home in Ireland before the Irish Open, using his two-year-old 910D2 as a base point.

“This one just performs so much better,” McIlroy said at the Irish Open. “I’m getting less spin, which is great in the wind, and it carries 15 yards further in calm conditions.”

Think he knew with that quote that he was ready for The Ocean Course?

McIlroy’s other new additions include a 17-degree Titleist 910F 5-wood (with a Fujikura ZCom Pro 95 graphite shaft), first put into play two weeks ago at the World Golf Championships-Bridgestone Invitational. That replaced a 503i 2-iron he played at the British Open and an 18-degree 906F 5-wood he had in the bag since turning pro. McIlroy also had his 712 MB irons replaced at Firestone after the grooves were getting worn.

Besides leading the field in driving distance, McIlroy led the field in birdies (20), was 10th in putting average (1.688) and 13th in greens in regulation (67 percent).

MAJOR WRAP: McIlroy also played a Titleist ProV1x ball, joining Bubba Watson (Masters) and Webb Simpson (U.S. Open) as major winners with the ProV1x. Ernie Els won the British Open with a Callaway Hex Black Tour. As far as winners’ full product lines, Titleist owned half the major count with McIlroy and Simpson, while Watson carries Ping and Els is with Callaway.

Kinnaird/Getty Images

Keegan Bradley finished T3 at the PGA with a refurbished Odyssey putter.

CRISIS AVERTED: Would you be nervous if your longtime putter broke during a Tuesday match before the year’s final major? That’s what happened to Keegan Bradley when his Odyssey belly putter, “The Tooth”, snapped while playing with Dustin Johnson, Phil Mickelson and Rickie Fowler.

During play, the “spud” broke, a piece that secures the putterhead to the shaft. Fortunately, an Odyssey rep at Kiawah came to the rescue and used the old shaft with a new White Hot XG Sabertooth head. Voila, the “Tooth 2.”

“No worries at all,” Bradley said last week. “It’s amazing, with my old shaft it looks the exact same, there’s no difference.

Bradley and the Tooth 2 finished T3 at the PGA.

MORE NEW STUFF: Pat Perez, in the picture at the PGA for the first two rounds before finishing T21, used a new TaylorMade Ghost Spider prototype putter. … Peter Hanson finished T7 with the same Ghost Spider prototype and a new 18-degree TaylorMade Rescue 11.

WINNER’S BAG: McIlroy at the PGA Championship:
Driver: Titleist 913D3 (Mitsubishi Diamana proto 70X, 8.5 degrees)
Fairway woods: Titleist 906F2 (13 degrees), Titleist 910F (17 degrees)
Irons: Titleist MB (3-9)
Wedges: Titleist Vokey Design SM4 (46, 54, 60 degrees) 
Putter: Scotty Cameron GSS 
Ball: Titleist Pro V1x

This Sunday is Father’s Day. Each day this week, PGATOUR.COM will take a look at some unique father-son moments involving PGA TOUR pros.  Here is today’s Ultra Father-Son Moment presented by Michelob Ultra:

By Helen Ross, PGATOUR.COM

PACIFIC PALISADES, Calif. -- Pat Perez wasn't exactly having an out-of-body experience Friday at Riviera.

Perez didn't feel particularly well, though -- at least not until he got down to business and two-putted from 56 feet at the first hole. That birdie was the first of five Perez made at Riviera on the way to a 65 that left him one shot behind Phil Mickelson after two rounds of the Northern Trust Open.

Even after he signed his scorecard, though, Perez said he wasn't exactly sure how he managed to go so low.

"I woke up this morning, didn't really feel that good, and I told my caddie on the range, I can't really feel my body,” Perez said. “My body feels weird, I don't know what's going on. I don't know if it was breakfast or what, but I don't feel that great.  We'll see what happens.
   
"I birdied (No.) 1 and hit some pretty good shots. Didn't hit it great, I just putted pretty well. That was about it."

The 65, which matched Jarrod Lyle for the low of the tournament so far, landed Perez in Saturday's final group. The last time he played with Mickelson was at the World Golf Championships-Accenture Match Play Championship, and "I lost," Perez was quick to point out before adding one caveat.

"I'm not playing him," he said. "Obviously he's playing well, and I'm going to have to play awful well to beat him this weekend. I'm not worried about him. It'll be fun to play with him, but you know, I know that I have to play well out there to beat everybody else, as well."

Perez only hit five fairways on Friday but still managed to find 12 greens in regulation. He was opportunistic when he got there, too, using just 25 putts to rank first in distance of putts made and fourth in strokes gained putting.

"I didn't hit it like you'd think I would," Perez conceded. "I didn't drive it all that great. I just scrambled well. I put myself in the right places to make par or birdie."

Perez has made the cut in his first five starts, three times finishing in the top 25, and he ranks 29th in the FedExCup. He credits his consistent play to the switch to the belly putter he made last October at the suggestion of his good friend, Tommy Armour III.

"(He) was all over me for a year to change, and I didn't want to try it," Perez said. "I've tried some before, but I didn't really like it. I didn't get the right one. We went down to Cabo, and he was down there with it, and he was all over me on it. You know, it was just incredible how the ball rolled and how  I was just making everything. I said, well, I'll try it.

"... It was really nothing that stopped me from doing it, but once I got comfortable with it, it was great."

Petersen/Getty Images

Gary Woodland put a Titleist ProV1x in play at the WM Phoenix Open.

By John Schwarb, PGATOUR.COM

Gary Woodland needs a few more yards like a Corvette needs more horsepower, but he got them last week at TPC Scottsdale with a move from the Titleist ProV1 to the ProV1x.

Woodland, who has been working through swing tweaks with acclaimed teacher Butch Harmon, noticed some increased spin off his irons and wanted to make sure he had the right ball for his updated swing. He had already adjusted some of his clubs, adding one degree of effective loft by moving his Titleist 910 adjustable driver from its C•1 setting (6.75º loft, 57.75º lie) to A•1 (standard; 7.5º loft, 58.5º lie) and making the same move with his Titleist 910Fd 13.5º fairway wood.

He sought out Titleist golf ball R&D specialist Fordie Pitts, who put Woodland through paces on a TrackMan launch monitor with the company’s slightly harder, less-spinning ProV1x. With his short- and mid-irons, the monitor showed a reduction of some 150-200 rpm in spin and an increase of 1-1.5 mph in ball speed. With his driver, Woodland’s ball speed increased some 4 mph with similar spin.

(As PGA TOUR ShotLink radar stats show, Woodland isn’t exactly slacking in ball speed as it is.)

Woodland took the ProV1x to the course for further testing, and found the iron performance he was looking for. With the driver, his carry yardage increased some 14 yards – no joke.

The end of the story? Woodland finished T26 at the Waste Management Phoenix Open, closing with 66 on Sunday. He was T4 for the week in Greens in Regulation.

LONG AND SHORT: Tiger Woods held court Tuesday at the AT&T Pebble Beach National Pro-Am and explained his disdain for long putters , also proposing a solution. He said he had told Peter Dawson of the R&A that the putter should be no longer than the shortest club in one’s bag – essentially 35 to 36 inches, the length of most players’ wedges.

One side note to that – with a such a rule you wouldn’t see players use a long putter for measuring clublengths for penalties (as someone with a full broomstick putter could conceivably do), nor moments like last week at TPC Scottsdale where Spencer Levin used his belly putter to slap-shot a ball out of a bush.

RUSH TO MARKET: Bridgestone Golf is moving its new B330 ball line into the marketplace ahead of its original March 1 release, citing buzz from the 2012 PGA Merchandise Show and Brandt Snedeker’s come-from-behind win at the Farmers Insurance Open.

Its four new models – the Tour B330, Tour B330-S, Tour B330-RX and Tour B330-RXS – are on sale now in sunbelt states and will be available nationwide soon.

Speaking of Snedeker, he added a Callaway RAZR X Black 3-wood in his bag at the WM Phoenix Open, replacing a TaylorMade Burner 2.0.

DUSTED OFF: Ryan Palmer shot 64 in the opening round at TPC Scottsdale, thanks in part to an old Odyssey Rossie II putter that’s been in and out of his bag since college.

Petersen/Getty Images

Vintage Odyssey

“I've used the exact same putter the last two years, and of course had two of the best years of my career,” said Palmer, who won for the third time on the PGA TOUR at the 2010 Sony Open in Hawaii. “But towards the end of the year last year, around the BMW, I just got frustrated with not making anything, so I thought I'd try something different, put a similar style head in play and actually had some success. Had a seventh-place finish at Malaysia with it, 20th place finish at Disney with it, so I knew it was a good putter.

“But my first two weeks out here I could tell I wasn't comfortable when I'd get over the short putts. When I got home from Bob Hope, I pulled it out of the garage and was putting in my living room, then went outside in the backyard on my putting green, and I knew it was time to bring it back out. So it showed today.”

Alas, that 64 would be his only round in the 60s as he faded to T55 on Sunday.

AMBUSHED: TaylorMade’s RocketBallz campaign continued at at PGA TOUR Superstore in Scottsdale, where Johnson Wagner and Pat Perez handed out cash for yards gained with the company’s new RBZ 3-wood. Check out the video to see happy golfers after they got stacks of $10 bills. We’d be happy too.

WINNER’S BAG: Kyle Stanley at the Waste Management Phoenix Open:
Driver: Titleist 910D3 driver, 8.5 degrees
3-wood: Titleist 910Fd, 13.5 degrees
Irons: Titleist 503i 2-iron, MB irons 4-PW 
Wedges: Vokey Design Spin Milled 52, 56, 60 degrees
Putter: Scotty Cameron Timeless GSS
Ball: Titleist ProV1x