Day and Tringale shot a 7-under 65 in the better-ball final round to finish at 32 under at Tiburon Golf Clubin Naples, Fla. They each earned $335,000.
Day and Tringale opened with a 55 on Thursday in the scramble round and shot a 64 on Friday in modified alternate-shot play.
Leading by three shots going into the final round, they had just one birdie in the first eight holes before closing with six in their last nine.
The teams of Billy Horschel-
Scott shot a 3-under 69 while Strange and overnight leader Ormsby had 71s for 54-hole totals of 10-under 206 on the Royal Pines resort course in Gold Coast, Australia.
Weekley, playing in Australia for the third time in four weeks, also shot 69 and was tied for fourth with Australian Jason Scrivener, who shot 68. Weekley provided one of the shots of the day when he chipped in for an eagle on the par-5 12th.
American Scott Stallings shot 68 and was tied for seventh, four strokes behind.
Australian Jarrod Lyle, back playing regularly after recovering from his second bout of leukemia, shot 70 and was in a group tied for ninth at 5-under, five behind.
Marcus Fraser of Australia shot a 2-under 70 to take a one-shot lead after the third round of the Thailand Golf Championship in Chonburi, Thailand.
Fraser is playing only his second tournament since returning from a long break due to a wrist injury, but has been among the most consistent players off the tee at the Amata Spring Country Club.
His 5-under total of 211 put him one shot ahead of Anirban Lahiri of India, who carded a 68.
Branden Grace had his lead cut to just one stroke at the Alfred Dunhill Championship in Malelane, South Africa, after shooting a level-par 72 in the third round, allowing several challengers to close the gap behind him.
Grace had a five-stroke cushion after the second round, but a late surge by Lucas Bjerregaard of Denmark erased most of the advantage. Bjerregaard had an eagle on the 13th and then birdied his last three holes for a 66 to climb to second place.