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Norberto "Nito" Bravo will fight Freddy "El Riel" Hernandez tonight in the main event at AVA Amphitheater at Casino del Sol, 5655 W. Valencia Road.

Hernandez has lost just once in 22 decisions. He has 17 knockouts. Bravo is 25-15-3 with 14 knockouts.

Another bout will feature featherweights Tomas "Norteno" Villa (18-5, 12 KOs) of Midland, Texas, and Adolfo "El Terror" Landeros from Mexico City.

The card begins at 4:30 p.m.

OWINGS MILLS, Md. — Ravens quarterback Steve McNair announced his retirement Thursday, ending a 13-year career in which he was selected co-MVP, led the Titans to a Super Bowl and orchestrated the most successful regular season in the Ravens history.

McNair, 35, received a standing ovation from his teammates after revealing his decision, then contained his emotions during a hastily arranged news conference.

"Coming out and making this decision, it was hard," he said. "Mentally, I could go out and play. But physically, I couldn't do it anymore."

● Billionaire developer Edward P. Roski Jr. has made a commitment to build the kind of stadium an NFL team needs to thrive in Los Angeles. Now, he is hoping one will commit to play there.

Roski, a part owner of the Kings and Lakers who has spent years trying to lure the NFL back to this area, unveiled plans Thursday for a 75,000-seat facility in the City of Industry. He said it could be finished in time for the 2011 season.

"I intend to develop our stadium project that meets all of the NFL requirements, and more," Roski said at a Staples Center news conference. "Always the most important thing has been the certainty of doing this. A team is not going to commit to coming to Los Angeles without a stadium. … The stadium is a certainty, and it will be built."

And, Roski added, without public money.

"Absolutely no taxpayer dollars," he said. "There's no taxpayer dollars to get."

Roski said the cost would be around $800 million, adding the stadium will be built into a hillside, meaning far less steel will be required. And that, he said, will result in a cost of about $400 million less than it might be otherwise.

Roski said construction will not begin until a team agrees to move, adding he did not expect an expansion team to be involved. The NFL has said it has no plans to expand.

● Cardinals inside linebacker Karlos Dansby signed a one-year tender offer worth just over $8 million as the team's franchise player.

● The Packers will retire Brett Favre's No. 4 in the season opener against the Vikings on Sept. 8.

Saturday racing at United Sports Arizona Race Park will feature ASCS Non-Wing Sprint Cars, USA Late Models and Arizona Mini Sprints.

Gates open at 5 p.m., and racing begins at 6:30.

For more information, check out the track at www.usadirttrack.com or call 574-8515.

DEERFIELD, Ill. — The Bulls fired interim coach Jim Boylan on Thursday. The Bulls were 24-32 under Boylan, who was promoted from assistant after Chicago fired Scott Skiles in December.

● The Bucks fired Larry Krystkowiak after going 26-56 in his first full season as an NBA head coach.