EUGENE (AP) - Clothing and sobriety would seem unlikely requirements of a college Ultimate Frisbee squad, but the lack of both has brought an end to the University of Oregon's season.

A five-member student board that governs club sports at the university has voted to cut the season short because of conduct violations. The third-ranked Ducks were among the favorites to win their second national title since the team formed in 1978.

The student board ruled last week after receiving a complaint that members of the men's team had played naked in a game at Oregon State on April 11. More than 80 people filled a meeting room Monday night as the team unsuccessfully appealed the ruling, The Register-Guard newspaper reported.

"If this had been an isolated incident we would have treated it much differently,'' said Jeff Gibb, a member of the club sports executive committee. "I'm not sure I can say that I trust the judgment of the Ultimate team - that's why it's so hard for me to give you another chance.''

The team had been placed on probation in November, following a party for more than 200 Ultimate players from around the Northwest. Eugene police responded to a noise complaint and found five kegs of beer and several minors hiding in the attic.

The year before, the team was warned after players were found drinking before a fundraiser. The team also got in trouble for speeding tickets on the way to a tournament at Stanford.

Team co-captain Dusty Becker apologized to the board, but wasn't too apologetic.

"Speeding, drinking, nudity - they're not bad things,'' he said. "They're things a big portion of the community doesn't think are wrong.''

Since being placed on probation, the team has traveled with chaperones, team co-captain Steve Kenton said. The adult chaperones were present on the Saturday afternoon at Oregon State, when the club's A and B teams, scheduled to play each other, decided to play a naked point - a ritual in Ultimate where one team plays without shirts and the other plays without pants or underwear.

"To run around naked is just kind of a hippie, ultimate thing,'' Becker said. "We didn't think there was anything wrong at the time.''

A female trainer present at the tournament filed a complaint with Oregon State's public safety department, a copy of which was received by the student board.

Team captains said they plan to quickly make a last-ditch appeal to the UO student government Senate. To qualify for the national tournament in Columbus, Ohio, the team must play at a regional tournament this weekend.

At Monday's meeting, team members read from a handful of more than 30 letters they had received from Ultimate coaches and players from across the nation, asking the committee to reconsider its decision.