Green Bay Packers running back Alex Green is tripped up by Kansas City Chiefs' Tysyn Hartman (46) during the first half of an NFL preseason football game Thursday, Aug. 30, 2012, in Green Bay, Wis.
Jo-Wilfried Tsonga of France jumps over the net during his match against Slovakia's Martin Klizan in the second round of play at the 2012 US Open tennis tournament, Thursday, Aug. 30, 2012, in New York. Fifth-seeded Tsonga was upset by Klizan in the second round.
Arizona Cardinals wide receiver Michael Floyd (15) reacts to scoring a touchdown against the Denver Broncos during the first half of an NFL preseason football game, Thursday, Aug. 30, 2012, in Glendale, Ariz.
St. Louis Rams wide receiver Danny Amendola, left, dives into the end zone past Baltimore Ravens linebacker Albert McClellan after catching a 7-yard pass for a touchdown during the first quarter of a preseason NFL football game Thursday, Aug. 30, 2012, in St. Louis.
Serena Williams reacts during her match against Maria Jose Martinez Sanchez of Spain in the second round of play at the 2012 US Open tennis tournament, Thursday, Aug. 30, 2012, in New York.
In this multiple exposure photo, Oakland Athletics starting pitcher Travis Blackley delivers against the Cleveland Indians in the fifth inning of a baseball game, Aug. 29, 2012, in Cleveland.
Washington Redskins wide receiver Josh Morgan (15) pushes away Tampa Bay Buccaneers cornerback Leonard Johnson (29) during the first half of an NFL preseason football game, Aug. 29, 2012, in Landover, Md.
Boston Red Sox's Mauro Gomez, right, scores past Los Angeles Angels catcher Chris Iannetta on a sacrifice fly by Scott Podsednik during second inning of an baseball in Anaheim, Calif., Aug. 29, 2012.
Miami Dolphins wide receiver B.J. Cunningham (16) is tackled by Dallas Cowboys cornerback Teddy Williams (20) during the second half of a preseason NFL football game, Aug. 29, 2012, in Arlington, Texas.
Laura Robson of Great Britain reacts after beating Kim Clijsters of Belgium in the second round of play at the 2012 US Open tennis tournament, Aug. 29, 2012, in New York.
Real Madrid's Gonzalo Higuain from Argentina celebrates after scoring a goal during a Spanish Supercup, second leg soccer match against FC Barcelona at the Santiago Bernabeu stadium in Madrid, Aug. 29, 2012.
Kim Clijsters of Belgium returns a shot against Laura Robson of Great Britain in the second round of play at the 2012 US Open tennis tournament, Aug. 29, 2012, in New York.
Milwaukee Brewers' Jean Segura, left, runs to home after Chicago Cubs third baseman Luis Valbuena missed the catch during the seventh inning of a baseball game in Chicago, Aug. 29, 2012.
New York Yankees' Andruw Jones dives and catches a ball hit by Toronto Blue Jays' Adam Lind during the sixth inning in a baseball game, Aug. 29, 2012, at Yankee Stadium in New York. The umpires ruled that he dropped the ball as his body hit the ground.
Chicago Cubs center fielder Brett Jackson catches a fly ball hit by Milwaukee Brewers' Rickie Weeks during the third inning of a baseball game in Chicago, Aug. 29, 2012.
Swimmers train in the Aquatic Center ahead of the 2012 Paralympics Olympics, Aug. 28, 2012, in London. The Paralympic opening ceremony will be held at the Olympic Park in London starting Aug. 29.
Los Angeles Dodgers center fielder Matt Kemp (27) slams into the wall chasing a Colorado Rockies' Josh Rutledge triple during the first inning of a baseball game, Aug. 28, 2012, in Denver. Kemp was injured on the play.
Juan Monaco of Argentina serves to Spain's Guillermo Garcia-Lopez in the first round of play at the 2012 US Open tennis tournament, Aug. 28, 2012, in New York.
New York Mets' Ruben Tejada (11) scores past Philadelphia Phillies catcher Erik Kratz on a single by David Wright in the first inning of a baseball game, Aug. 28, 2012, in Philadelphia.
Boston Red Sox relief pitcher Alfredo Aceves walks off the field as the Los Angeles Angels celebrate after giving up the game winning sacrifice fly to Los Angeles Angels' Torii Hunter during bottom of the ninth inning of an baseball in Anaheim, Calif., Aug. 28, 2012.
Venus Williams holds her racket while playing Bethanie Mattek-Sands in the first round of play at the 2012 US Open tennis tournament, Aug. 28, 2012, in New York.
Milwaukee Brewers' Ryan Braun (8) scores off a double by Aramis Ramirez and on a throw from Chicago Cubs shortstop Starlin Castro that sailed wide of catcher Steve Clevenger during the first inning of a baseball game, Aug. 27, 2012, in Chicago.
St. Louis Cardinals' Yadier Molina hits a sacrifice fly to drive in Allen Craig as rain comes down before a rain delay at PNC Park in the sixth inning of the baseball game against the Pittsburgh Pirates, Aug. 27, 2012, in Pittsburgh.
Denver Broncos tight end Joel Dreessen (81) celebrates after catching a touchdown pass from quarterback Caleb Hanie against the San Francisco 49ers during the second quarter of an NFL preseason football game in Denver, Aug. 26, 2012.
Carolina Panthers wide receiver Kealoha Pilares (81) is tackled by New York Jets cornerback Isaiah Trufant (35) during the first half of a preseason NFL football game, Aug. 26, 2012, in East Rutherford, N.J.
Tokyo, Japan's Noriatsu Osaka (10) rounds the bases past Goodlettsville, Tenn., second baseman Lorenzo Butler (8) after hitting a walk-off, two-run home run in the fifth inning of the Little League World Series championship baseball game in South Williamsport, Pa., Aug. 26, 2012. Tokyo won 12-2 in five innings.
Indianapolis Colts quarterback Andrew Luck is sacked by Washington Redskins defensive end Stephen Bowen during the first half of an NFL preseason football game, Aug. 25, 2012, in Landover, Md.
Sugar Land Skeeters pitcher Roger Clemens acknowledges the crowd as he leaves during the fourth inning of a baseball game against the Bridgeport Bluefish, Aug. 25, 2012, in Sugar Land, Texas. Clemens, a seven-time Cy Young Award winner, signed with the Skeeters of the independent Atlantic League this week.
Aguadulce, Panama's Daniel Fernandez, right, scores past Tokyo's Tatsuya Irie on a hit by Daniel Castro in the second inning of the international championship baseball game at the Little League World Series, Aug. 25, 2012, in South Williamsport, Pa. Japan won 10-2.
New Orleans Saints running back Chris Ivory (29) leaps over Houston Texans defensive back Johnathan Joseph (24) in the first half of an NFL preseason football game in New Orleans, Aug. 25, 2012.
Philadelphia Eagles tight end Chase Ford (89) fights off Cleveland Browns linebacker Ben Jacobs (54) after a pass reception in the fourth quarter of an NFL preseason football game, Aug. 24, 2012, in Cleveland. The Eagles won 27-10.