Matthew Wolff and Collin Morikawa grew up about 30 minutes apart in California and golfed against each other in high school. That was only a few years ago.

Sunday’s competition in Blaine, Minnesota, could result in a much bigger reward. The first-month professionals are in prime positions for one to get his first career win at a first-time event.

Wolff, the former Oklahoma State All-American who turned pro in June, shot a 9-under 62 Saturday to share the lead with Morikawa and Bryson DeChambeau at 15 under after three rounds of the inaugural 3M Open.

Morikawa shot a 7-under 64 at the TPC Twin Cities, DeChambeau a 1-under 70.

Seeking his first win in 31 tour starts, former OSU Cowboy Wyndham Clark shot a 64 and was tied with Adam Hadwin (69) one shot back.

Wolff, 20, who won the NCAA individual title for OSU on Memorial Day, is playing in his third event since turning pro; Morikawa, 22, is in his fourth. They’re the final pairing Sunday.

“It’s on a lot bigger stage, but our games played very well throughout the spring,” said Morikawa, named the Pac-12 Men’s Golfer of the Year for California in May. “We’re going to have to control our nerves, remember who we are, what brought us out here.”

Said Wolff, “These guys are really good, and I know I’m really good, so it’s going to be fun.”

A bomber off the tee, Wolff is averaging 306.5 yards through three rounds with his herky-jerky swing. A change in philosophy is allowing that length to be more of an asset.

“The last couple weeks I think I’ve been a little too strategic. I got together this week with my team and I said, ‘You know what, I’m just going to rip driver and just send it.’ That’s kind of what I’ve been doing, and it’s been working out,” he said.

Wolff, who made his professional debut two weeks ago by finishing 80th at the Travelers Championship and missed the cut at last week’s Rocket Mortgage Classic, added stellar approach shots to help him record six straight birdies on Nos. 5-10. None of the putts were longer than 8 feet. Birdies at Nos. 13 and 15 made a round of 59 seem possible.

However, Wolff missed a 4-foot birdie putt on No. 16 and a tee shot into a bunker led to bogey on the par-3 17th. He scrambled for birdie on No. 18 after an errant tee shot.

“When I birdied 10 to get to 7 under, I was kind of thinking 59, but I kind of knew I had to stay in the moment,” Wolff said. “And my caddie, Steve Lohmeyer, he’s been really good about that. We talk about, you know, free agency and pretty much anything in between shots to kind of take my mind off of it, which really helped.”

Calling his round “pretty much stress-free,” Morikawa birdied five of his first seven holes, but only three the rest of the way.

“Just hit my lines, hit a lot of good shots and played to my strengths. Ball-striking has been my strength ever since I’ve been a little kid,” he said.

Playing in ideal weather conditions — temperatures in the low-80s, increasing clouds and no wind — 65 of the 85 players shot under par on the par-71 layout.

DeChambeau barely did.

After his sixth career win and first since the Shriners Hospitals for Children Open in November, he opened the day with a two-shot lead but birdied only the first and last holes to go with one bogey and 15 pars.

“I just didn’t make a couple putts that were necessary to give myself that three-, four-shot lead like I should have today,” he said.

Sixteen players are within four shots of the lead, including Hideki Matsuyama, former OSU star Charles Howell III and Troy Merritt, who graduated from nearby Spring Lake Park High School. Each shot a 66 and is two shots behind.

”You always want to come out here right away and have success, but that’s really hard to do,” said Merritt, 33. “These kids are doing well and that’s good for the game.”

Four share LPGA lead

A late slip cost Sung Hyun Park control and she slipped into a four-way tie for the lead going into the final round of the Thornberry Creek LPGA Classic in Oneida, Wisconsin.

Park, who returned to No. 1 in the world after winning last week in Arkansas, made double bogey on the par-5 15th at the Thornberry Creek of Oneida course.

She missed a 15-foot birdie putt on the final hole and remained tied for the lead with Shanshan Feng (65), Tiffany Joh (66), and Ariya Jutanugarn (67).

They were at 20-under 196.

Yealimi Noh, the 17-year-old who got into the event through Monday qualifying, played in the final group with Park and matched her with a 69. Noh had a chance to share the lead until her 18-foot birdie chance missed.

Daly denied use of cart

Organizers of the British Open have refused a request by former champion John Daly to use a golf cart at the championship in Royal Portrush this month.

Daly had applied to use a cart because of his arthritic right knee.

The R&A said it was declining the request because “walking the course is an integral part of the championship and is central to the tradition of links golf.” It said it was important to “ensure that, as far as possible, the challenge is the same for all players in the field.”

The governing body says Portrush in Northern Ireland was not suited to golf carts, and was concerned that “some parts of the course, where there are severe slopes and swales, would be inaccessible.”

In its statement released Saturday, the R&A said “we appreciate the difficulty John is facing and have full sympathy for him as this is clearly a serious, long-term condition.”

The PGA of America allowed Daly to use a cart at this year’s PGA Championship at Bethpage Black. He was the first player to ride in a cart at a major since Casey Martin in the U.S. Open at Olympic Club in 1998 and 2012.

Reacting to the R&A’s decision, Daly said on Twitter he was “quite disappointed” and he “could not disagree more with their conclusions.”

Daly, the 1995 champion at St. Andrews, said he is aiming to take part in the British Open nonetheless, adding “fingers crossed I can make it thru the pain.”