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Linksoul John Ashworth & Co.: Signs John Merrick to its tour staff, and he will wear the company’s apparel on the PGA Tour.

AHEAD: Promotes Jeff Waller to the new position of senior director of global business development.

Mitchell Golf: Promotes Kyle Pinger to director of sales and marketing.

Leupold & Stevens: Hires Rob Morrison as vice president of marketing.

Mountain Ridge Country Club (West Caldwell, N.J.): Reports that member Errol Cook made two holes-in-one on Saturday, June 23. Cook aced the par-3 14th and 16th holes about 15 minutes apart.

Mitchell Golf: Promotes Kyle Pinger to director of sales and marketing.

Leupold & Stevens: Hires Rob Morrison as vice president of marketing.

Grand Traverse Resort and Spa Golf Academy (Acme, Mich.): Instructors Scott Hebert and Lee Houtteman are in this week’s PGA Professional National Championship through June 27 in Seaside, Calif.

Eaton Corp.: Hires Brandon Sowell as global sales and marketing manager for Golf Pride.

Eaton Corp.: Hires Brandon Sowell as global sales and marketing manager for Golf Pride.

Guru Training Systems: Reports on Belgian Nicolas Colsaerts, who won the European Tour’s Volvo Match Play Championship and finished 27th at the U.S. Open.

KemperSports: Promotes Ollie Becker to regional operations executive and names Lance Iwanaka as general manager of The Bridges Golf Club in San Ramon, Calif.

Keiser University: College of Golf reports on Kamil Chojnicki and Matsuez Kniaginin, both of Warsaw, Poland, and both of whom are products of the school’s golf management program.

Srixon: Signs Na Yeon Choi to an endorsement contract. Choi won a Korean Ladies Professional Golf Tour event in 2004 as an amateur and joined the LPGA in 2008. She won the LPGA money title in 2010.

Golfweek: Announces University of Alabama freshman Justin Thomas as the winner of the 2012 Haskins Award, an honor given to the nation’s top collegiate golfer. The award is sponsored in part by the magazine.

Srixon: Signs Na Yeon Choi to an endorsement contract. Choi won a Korean Ladies Professional Golf Tour event in 2004 as an amateur and joined the LPGA in 2008. She won the LPGA money title in 2010.

Nike Golf: Signs Dylan Frittelli to an endorsement agreement. Frittelli will sport Nike Golf head-to-toe, play a Nike bag and clubs.

Callaway Golf: Appoints Harry Arnett as senior vice president, marketing. In this role, Arnett assumes leadership of the company’s global marketing, communications and go-to-market functions.

Linksoul: Chief Creative Officer John Ashworth will participate in the inaugural Hundred Hole Hike, walking and playing more than 100 holes on July 16 to benefit the San Diego-based After School All-Stars and North County Junior Golf Association.

Red Mat Media: Seeking sales representatives for its Who’s Your Caddy golf mobile app.