New England Patriots quarterback Tom Brady during the second quarter of a NFL football game against the Tennessee Titans at Gillette Stadium in Foxborough, Mass. Sunday, Oct. 18, 2009

...Rogash/Getty Images) New England Patriots head coach Bill Belichick reacts against the Denver Broncos during an NFL football game in Denver, Sunday, Oct. 11, 2009. (AP Photo/Jack Dempsey

...Hill February 27, 2008 in Washington, DC. The subcommittee also heard testimony from the head of the NFL, NBA, NHL, MLB and their players' unions. (Photo by Chip Somodevilla/Getty Images

...as ranking minority member Rep. Henry Waxman, D-Calif., left, looks on during a hearing regarding the NFL's steroid policy on Capitol Hill Wednesday, April 27, 2005. The NFL's steroids policy is tough...

...Quarterback Brett Favre #4 of the New York Jets looks up with his helmet off during an NFL football game against the San Francisco 49ers at Candlestick Park on December 7, 2008 in San Francisco...

NHL, NBA, NFL and MLB union heads

...Fehr (L) and Major League Baseball Commissioner Bud Selig talk before testifying with the heads of the NFL, NBA, and the NHL to the U.S. House Subcommittee on Commerce, Trade and Consumer Protection about...

...Fehr (L) and Major League Baseball Commissioner Bud Selig talk before testifying with the heads of the NFL, NBA, and the NHL to the U.S. House Subcommittee on Commerce, Trade and Consumer Protection about...

...July 1 ATLANTIC CITY, NJ - JULY 12: Former MLB Player Jose Conseco gets knocked out by former NFL Player Vai Sikahema at 1:37 of the 1st round at Gary Barbera's War at the...

...Hill February 27, 2008 in Washington, DC. The subcommittee also heard testimony from the head of the NFL, NBA, NHL, MLB and their players' unions

...Fehr (L) and Major League Baseball Commissioner Bud Selig talk before testifying with the heads of the NFL, NBA, and the NHL to the U.S. House Subcommittee on Commerce, Trade and Consumer Protection about...

MLB,NFL,NBA, and NHL referees

...Past and present members of the NHL's Boston Bruins, the NBA's Boston Celtics and the NFL's New England Patriots carry the Boston Red Sox' 2007 World Series rings onto the field before...

...At left, former Dallas Cowboys wide receiver Michael Irvin speaks to the fans at halftime of an NFL football game in Irving, Texas, in this Oct. 14, 2007 file photo. Tennessee Titans cornerback Adam "Pacman...

...and Government Reform Committee Chairman Henry Waxman (D-CA) holds a hearing about the combat fratricide of NFL star and US Army Ranger Pat Tillman on Capitol Hill August 1, 2007 in Washington, DC. The...