Hideki Matsuyama earned his first victory in the United States and validation as one of golf's young stars Sunday with birdie on the 18th hole to force a playoff and a 10-foot par putt on the first extra hole to win the Memorial.
In a tournament that Masters champions Bubba Watson and Adam Scott threw away at Muirfield Village in Dublin, Ohio, Matsuyama looked certain to join them.
He lost the lead by dropping three shots on two back-nine holes and pushed his drive toward the bunkers on the final hole. Lightly slamming his driver to the turf in disgust, the head broke off. He followed with an approach to just outside 5 feet for birdie and a 3-under 69.
That forced a playoff with Kevin Na, who finished his round of 64 about two hours earlier. Both were at 13-under 275.
Japan's Matsuyama chose not to replace his driver in the playoff, and his 3-wood went into the bunker. Na drove left into the creek but still had 10 feet for bogey on 18 in the playoff when Matsuyama made his par putt.
"I'm really, really happy," Matsuyama said through his interpreter. "It's a dream come true to win at Mr. (Jack) Nicklaus' course."
Matsuyama, 22, earned $1,116,000. He had won five tour titles, all on the Japan Golf Tour.
A consolation for Na was his runner-up finish moved him high enough in the world ranking that he'll be exempt for the U.S. Open at Pinehurst No. 2 from June 12-15. He had planned on going through 36-hole qualifying Monday.
Third-round leader Watson was in control until two wild tee shots -- one into deep rough on 14 that led to bogey, and one so far right on the par-5 15th that it went into a neighborhood out-of-bounds. That led to double bogey. He closed with a 72 and finished a shot out of the playoff.
Top-ranked Scott, poised for his second straight PGA Tour win, put his tee shot into the water on the par-3 12th for double bogey, took two shots to get out of a bunker on 14 for bogey and dropped another shot at 15 when his wedge hit the pin and caromed back into the fairway. Scott (71) tied Chris Kirk (68) at 278.
LPGA: Stacy Lewis won the ShopRite Classic to regain the No. 1 world ranking from Inbee Park, finishing with a 4-under 67 for a six-shot victory in Galloway Township, New Jersey.
Lewis, who was No. 1 for four weeks early last year, ended Park's 59-week run in the top spot. Lewis finished at 16-under 197 at Stockton Seaview and won $225,000.
San Jose's Christina Kim (72) was second, her best finish since 2010. She birdied Nos. 9-11 but was 3 over on the final seven holes, including a double bogey on 18.
"I hadn't been in contention in awhile, so I kind of forgot what it was like having nerves," said Kim, who won $138,527.
Park (70) tied for eighth at 7 under.
Paula Creamer (66) and Michelle Wie (70) finished at 4 under, earning $13,212 each.
European: Thongchai Jaidee won a Nordea Masters playoff on the first extra hole against Stephen Gallacher and Victor Dubuisson. Jaidee birdied the 18th at PGA Sweden in Malmo, while the others made pars. Jaidee shot a 7-under 65 to tie Gallacher (68) and Dubuisson (67) at 16-under 272. Second-ranked Henrik Stenson (71) was fifth at 274.
Champions: Tom Pernice Jr. made a 10-foot birdie putt on the second playoff hole against Doug Garwood to win the Principal Charity Classic in Des Moines, Iowa. Pernice shot a 3-under 69 to tie Garwood at 12-under 204 at Wakonda Club. San Mateo's Michael Allen (71), Bill Glasson (64), Jay Haas (67) and Mark Calcavecchia (70) finished at 205.