Daley, who entered the tourney with no status on the Champions Tour, outpaced a big-name field to notch a victory at the tour's third major event of the season.
Daley finished at 14-under 266, two shots ahead of Tradition winner Tom Lehman (1-under 69).
Grabbing sole possession of third place was reigning U.S. Senior Open winner Olin Browne, who registered a 5-under 65 to end at 11-under.
Mark Calcavecchia, who shared the third-round lead with Daley, cooled off Sunday, stumbling to a 2-over 72.
That was good for a tie with defending Players champ Fred Couples (1-over 71) at 10-under 270.
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