Langer appeared to be in trouble when his second shot on the par-5 18th ended up in the rough short of the green. He hit a brilliant pitch to 5 feet and made the putt after Sluman’s birdie attempt rolled just wide.
The victory was the 56-year-old Langer’s third of the year and his third major title on the Champions Tour. The two-time Masters champion shot an even-par 70 to finish at 15-under 265 at Fox Chapel.
Sluman had a bogey-free 65 to match Langer, but narrowly missed a birdie putt on the first playoff hole that would have won it.
Russ Cochran, who trailed by seven shots early in the final round, had a 67 to finish third at 14 under.
Defending champion Kenny Perry tied Langer for the lead heading into the back nine, but faded badly over the closing holes. Perry’s 69 left him two shots out of the playoff.
NW Arkansas Championship: Stacy Lewis made a 7-foot birdie putt on the final hole to finally win an official event in her adopted state.
The top-ranked Lewis, the Texan who played at the nearby University of Arkansas, had an unofficial win in the rain-shortened 2007 event as an amateur. On Sunday, she closed with a 6-under 65 for a one-stroke victory.
Lewis birdied three of her final holes for her third LPGA Tour victory of the year and 11th overall. She finished at 12-under 201 at Pinnacle Country Club.
Lydia Ko, Cristie Kerr and Angela Stanford tied for second. Ko finished with a 65, and Kerr and Stanford shot 67. Second-round leader Michelle Wie had a 73 to tie for eighth at 8 under.
BMW International Open: Fabrizio Zanotti became the first player from Paraguay to win a European Tour event, beating second-ranked Henrik Stenson on the fifth hole of a playoff.
Zanotti won when Stenson conceded after failing to hole a bunker shot. Rafa Cabrera-Bello was eliminated on the fourth extra hole, and Gregory Havret dropped out on the second.
Zanotti closed with a 7-under 65 to match Havret (66), Stenson (67) and Cabrera-Bello (67) at 19-under 269 on the Gut Laerchenhof course.
United Leasing Championship: England’s Greg Owen won his first Web.com Tour title, overcoming a seven-stroke deficit with a 5-under 67 for a one-shot victory.
The 43-year-old Owen, the winner of the European Tour’s 2003 British Masters, had a 9-under 279 total at Victoria National and earned $108,000.
Playing more than an hour ahead of the final groups, Owen opened with a triple bogey, birdied Nos. 6 and 7, and played the first eight holes on the back nine in 7 under — making five birdies and an eagle — before closing with a bogey.
Ryan Armour and third-round leader Mark Hubbard tied for second. Armour finished with a 68, and Hubbard had a 75.
Island Resort Championship: Molly Aronsson won her first Symetra Tour title, beating former University of Washington teammate Sadena Parks by a stroke.
The 26-year-old Aronsson, from Shelburne, Vt., closed with an even-par 72 to finish at 1-under 215 at Sweetgrass Golf Club. She earned $18,750 to jump from 117th to 13th on the money list with $21,287. The final top 10 will earn 2015 LPGA Tour cards.
Parks finished with a 75.
Katie Kempter and Canada’s Sara-Maude Juneau tied for third at 1 over. Kempter finished with a 75, and Juneau shot 74.