Zoeller, who won $330,000 in the event last year, is the defending champion. Trevino made a hole-in-one worth $1 million in the 2001 tournament. Couples won $410,000 in winning the 2002 title here.
Mickelson is the only player to have played in the previous five Par 3 Shootouts, and the only one in this year's foursome without a win.
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