Tiger Allen weighed in 4½ pounds over the 125-pound limit and was disqualified from fighting Hong Gu of the Army at Fort Carson, Colo., Wednesday night.

Rock Allen boxed Mahlon Kerwick of Spokane, Wash., at 132 pounds in the afternoon and won 16-9. However, it was later disclosed by USA Boxing that Tiger had weighed in for his brother and allegedly signed paperwork on his behalf. Rock was disqualified, making Kerwick the winner.

The Allens' father and coach, Naazim Richardson, refused to let his sons appear before the organization's grievance committee and answer questions.

Things went much better for brothers Nonito and Glenn Donaire of San Leandro, Calif.

They won their 106-pound bouts in the afternoon. If they win again Thursday night, they will meet in Saturday's final.

"It doesn't really matter who wins as long as one of us goes to the Olympics," said 20-year-old Glenn, who often spars with 17-year-old Nonito but has never opposed him in an official bout.

Nonito Donaire opened the tournament by counter-punching his way to a 19-7 victory over Ronald Siler of Cincinnati. He then watched and rooted as Glenn overwhelmed Karoz Norman of St. Louis 26-9 in four 2-minute rounds, the Olympic format.

The brothers, who came to the United States in 1993, are trained by their father, Nonito, and Robert Salinas. If they meet in this tournament, the father will work in Nonito's corner.

The trials are a double-elimination tournament. The champions and loser's bracket winners in the 12 weight classes go to the box-offs Feb. 24-26 at Foxwoods Casino at Mashantucket, Conn.

The winners there will have to qualify in one of three Americas qualifying tournaments -- Tampa, Fla., Mexico and Argentina.

"I would be very disappointed if we did not qualify 12 boxers for the Olympics," said Gary Toney, president of USA Boxing.

The day at the Tampa Port Authority Cruise Terminal No. 6 started poorly for brothers LeChaunce and Teaunce Shepherd, students at Northern Michigan, but ended on a winning note.

Dante Craig of Cincinnati, the 1999 Golden Gloves champion, scored a 14-12 decision over 25-year-old LeChaunce Shepherd, the 1997 and 2000 U.S. champion and a 1999 Pan American Games bronze medalist. Shepherd also lost his opening bout in the 1996 Olympic Trials.

Shepherd landed the harder punches, especially left hooks, but the 21-year-old Craig was busier.

The 22-year-old Teaunce Shepherd, silver medalist in the U.S. championship, was too experienced for Verquan Kimbrough of Aliquippa, Pa., and won their 125-pound bout 18-4 Wednesday night. Shepherd had Kimbrough in trouble in the fourth round when Kimbrough took a standing 8-count.

As for his brother's loss, Shepherd said, "I wasn't disappointed at all. He boxed a very good bout, better than some he has won."

LeChaunce Shepherd, like all of Wednesday's losers, now fights in the challenge bracket and if he wins there, he will go to the box-offs against the trials champion.

The oldest boxer in the tournament, 33-year Darnell Wilson, a three-time U.S. champion and an Olympic team alternate in 1996, was forced into the losers bracket when he was outpointed 14-3 by 21-year-old Anthony Hanshaw of Mansfield, Ohio.

Robert Guerrero, at 16 the youngest boxer in the 156-bout tournament, edged Jason Franco, a 21-year-old soldier based at Fort Carson, Colo., 10-7 at 119 pounds in the afternoon.

The minimum age for competing in the Olympics is 17, and the deadline for reaching that age is March 27. Guerrero turns 17 on March 27.

Fifty-four boxers from the Americas will qualify for the Sydney Olympics. Cuba does not need to qualify and will automatically field a full squad as the world's top-ranked team.

Qualifying for the Olympics will be the winners and runners-up in 10 weight classes from 106 through 178 pounds and the winners at 201 pounds and super heavyweight at Tampa on March 27-April 1 and at Mexico City on April 17-22.

The winners in the lower 10 weight classes at Buenos Aires on May 23-28 also will qualify for Sydney.