Eduardo Romero overcame five bogeys - including four in a row at one point - to hold on for a four-stroke victory at the US Senior Open.
Romero signed for a three-over-par 70 on Sunday but finished the tournament at six-under-par 274 to cruise to his second major title on the Champions Tour.
Fred Funk finished second on two under but also struggled on Sunday, recording a five-over-par round, while Mark McNulty was one stroke further back in third.
The triumph, Romero's first major since winning a play-off at the Tradition in 2006, continued a productive season for Romero.
He has two victories and five top-10 finishes in 14 events.
Collated final round scores & totals
(USA unless stated, par 70):
274 Eduardo Romero (Arg) 67 69 65 73
278 Fred Funk 65 69 69 75
279 Mark McNulty (Irl) 68 70 73 68
280 Greg Norman (Aus) 70 72 68 70
281 John Cook 66 72 66 77
282 David Edwards 72 70 73 67, Bernhard Langer (Ger) 72 70 74 66, Joey Sindelar 73 72 68 69
283 Jeff Klein 73 73 64 73, Scott Hoch 76 70 68 69, Jay Haas 72 70 70 71
284 Tom Kite 67 71 71 75, Loren Roberts 74 72 71 67
285 Andy Bean 69 71 73 72, Gary Hallberg 69 76 70 70, Brad Bryant 70 71 73 71, Keith Fergus 73 71 66 75
286 R.W. Eaks 72 73 69 72, Tom Purtzer 70 74 72 70, Jeff Sluman 72 76 71 67, Morris Hatalsky 67 73 72 74, Don Pooley 70 74 71 71
287 Gil Morgan 71 77 69 70, Tom Watson 69 74 69 75, Scott Simpson 74 73 64 76, Ian Woosnam (Wal) 74 68 71 74
288 Juan Quiros (Spa) 67 73 70 78, David Eger 73 74 72 69
289 Jim Thorpe 74 72 74 69, John Harris 72 75 71 71, Mark James (Eng) 72 71 72 74
290 Michael Reid 76 72 66 76, Joe Ozaki (Jpn) 74 74 75 67
291 D A Weibring 71 69 72 79, John Morse 69 71 74 77, Doug Lacrosse 70 75 72 74
292 Danny Green 72 72 76 72, Bobby Wadkins 69 78 73 72, Lonnie Nielsen 74 72 75 71
293 Rod Nuckolls 74 72 71 76, Tom Carey 71 71 77 74, Katsuyoshi Tomori (Jpn) 72 76 71 74, Hale Irwin 74 71 72 76, Jeff Coston 73 74 72 74, Rick Cloninger 68 74 72 79, Billy null Rosinia 71 73 73 76
294 Costantino Rocca (Ita) 74 72 74 74, Gary Ostrega 71 77 72 74
295 Jim Woodward 73 75 73 74, Rick Karbowski 70 74 77 74, Fuzzy Zoeller 72 75 77 71
296 Denis Watson (Zim) 76 72 73 75, Bert Atkinson 72 75 73 76
297 Craig Steinberg 74 73 76 74, Tom Jenkins 75 73 72 77, Jeff Thomsen 74 73 76 74
298 Bob Gilder 71 76 74 77
299 Steve Bowen 75 71 78 75
301 Tom Doughtie 72 73 76 80
303 Stanford Lee 75 72 81 75
304 Bob Stephens 71 76 80 77
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