Frost joined 2011 winner Nick Price as the only golfers to lead wire to wire in the event's 19 years. It was his fourth career Champions Tour victory and first since last year's AT&T Championship in San Antonio.
In four events this season, Frost hasn't finished out of the top 10, posting ties for ninth, fifth and losing in a playoff to John Cook in Hawaii in the season-opening Mitsubishi Electric Championship.
Couples, the 2010 champion, began the day a stroke behind Frost and tied him after a birdie on the first hole. That was the last time Frost would relinquish the lead.
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