Chappell finished the tournament at 2-under 286. The Pac-10 player of the year was the only player to finish the tourney under par.
Indianas Jorge Campillo and Washingtons Nick Taylor tied for second, three shots back with a 1-over 289. Rickie Fowler of Oklahoma State and Sihwan Kim of Stanford tied for fourth at a 6-over 294. Floridas Billy Horschel finished sixth.
Clemsons Kyle Stanley trailed Chappell by four strokes after Friday, but he shot a 10-over 82 Saturday to fall from second into a tie for seventh. Stanley was the runner-up last year.
UCLA finished the four-day tournament with a 42-over score of 1,194, one stroke better than second-place finisher and defending champion Stanford, which was five strokes back on Friday.
Southern California finished two strokes back at 1,196. Ten-time NCAA champion Oklahoma State and Clemson rounded out the top five.
The tournament was played on Purdues 7,450-yard, par-72 Kampen Course and ended with the top 15 teams playing for the title.
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