Bob Tway birdied five of the final eight holes and became the PGA tour's first three-time winner in 1986, closing with an eight-under-par 64 to win the $500,000 Atlanta tournament.
Tway's 72-hole score of 269 was 19 under par on the hilly, 7,007-yard, par-72 Atlanta Country Club course.
Tway, 27, who was reared in the nearby Atlanta suburb of Marietta, overtook third-round leader Hal Sutton on the 15th hole and won by two shots over Sutton, who had a 70 and finished at 271.
Tway earned $90,000, pushing his money winnings to $446,119.
"When I finished Saturday, I told a few people I thought I would have to shoot 64 or 65 to win," Tway said. "It's very exciting to come back and win before your family and friends. It's something I'll never forget.
"I believe it was somewhat to my advantage, having played here many times as a high-schooler, but I still had to play well to win. I just hit the good shots at the right time."
Greg Norman, the season's leading money winner, also had a 64 on the heels of Saturday's 66 and finished in a tie for third at 273.
"The last two days, I got some enthusiasm generated," said Norman, who shot 71-72 the first two days. "I suppose the U.S. Open took more out of me than I imagined."
Tway, who joined the tour last year, beat West Germany's Bernhard Langer this year in a playoff for his first victory in the Andy Williams Open at San Diego. He came back to win the Westchester tournament two weeks ago.
Judy Dickinson holed an 87-yard shot for an eagle on the 11th hole, then made up for a double-bogey with three more birdies to gain a one-stroke victory over defending champion Pat Bradley in the Rochester International at Pittsford, N.Y.
Dickinson shot a two-under-par 70 to finish at 281 in the LPGA tournament at the Locust Hill Country Club. Bradley closed with a 68 to finish at 282.
Chris Johnson shot a 66 to finish third at 283, while Jan Stephenson had a 72 to place fourth at 284. Laura Baugh was fifth at 285 after a 69, while Marta Figueras-Dotti and Val Skinner shared sixth at 286.
Dickinson's victory was worth $38,250, boosting her season winnings to $90,575 and her career earnings to more than $500,000.
Chi Chi Rodriguez shot a final-round 70 to earn his first Senior PGA Tour title with a two-shot victory over Bruce Crampton in the $300,000 Senior Tournament Players Championship at Shaker Heights, Ohio.
Rodriguez, a 50-year-old native of Puerto Rico, had a 54-hole total of 10-under-par 206 on the par-72, 6,615-yard Canterbury Golf Club course. He earned $45,000 and is second behind Gary Player in 1986 Senior earnings with $168,563.
Crampton finished second at 208, and defending champion Arnold Palmer tied for third at 209 with Lee Elder and Don January.
Seve Ballesteros of Spain struggled to a 74 but still won his third Irish Open title at Dublin.
Ballesteros began the final round five strokes in front and wound up with a 72-hole score of three-under-par 285, two strokes ahead of Rodger Davis of Australia and South Africa's Mark McNulty.
Ballesteros collected $47,548 to regain leadership of the European money list from Howard Clark of Britain. Ballesteros has won more than $150,000 this season, and his career earnings from Europe are $1,350,000.
Veteran amateurs Aly Trompas and Gary Vanier swept the final match as a 10-man Northern Californian team rallied to beat Southern California, 26-19, in the North-South Team Matches of the 75th annual California Golf Assn. Championship at Pebble Beach.
Brandie Burton, 14, of Rialto parred the first hole of sudden death to win a playoff from Jean Zedlitz of Pleasanton to win the girls high school invitational.
Left-hander Kevin Wentworth of Manteca shot a one-under-par 70 to win the boys championship by five shots over Chris Robinson of Bakersfield.
Deane Beman, U.S. Tour Commissioner, completed his first tournament since 1973 with an 80 for a 22-over-par score of 310.