In this image taken from video, New York Yankees' Mariano Rivera, center, grimaces after twisting his right knee shagging fly balls during batting practice before a baseball game with the Kansas City Royals. Yankees manager Joe Girardi says closer Mariano Rivera has a torn right knee ligament, an injury that could potentially end his career.
Roger Bossard, Chicago White Sox head groundskeeper at U.S. Cellular Field, waits for batting practice to end before preparing the field for a baseball game between the White Sox and the Cleveland Indians, Thursday, May 3, 2012, in Chicago. Bossard joined the White Sox in 1967 and is known amongst the industry as "The Sodfather" and is highly influential in the development of new ballparks.
Miami Heat forward Chris Bosh (1), New York Knicks guard J.R. Smith, center, and Knicks forward Carmelo Anthony scramble for a loose ball in the first half of Game 3 of an NBA first-round playoffs at Madison Square Garden in New York, Thursday, May 3, 2012.
New Jersey Devils' Bryce Salvador, left, checks Philadelphia Flyers' James van Riemsdyk during the third period of Game 3 of a second-round NHL hockey Stanley Cup playoffs, Thursday, May 3, 2012 in Newark, N.J.
Former Major League Baseball pitcher Roger Clemens leaves the E. Barrett Prettyman United States Court House as his retrial continues on charges that Clemens committed perjury when he told Congress in 2008 that he had never taken steroids or human growth hormone, Thursday, May 3, 2012, in Washington.
Washington Nationals Bryce Harper heads to second base on an RBI double against the Arizona Diamondbacks in the sixth inning of a baseball game at Nationals Park in Washington, Thursday, May 3, 2012.
Official Marc Joannette, left, signals the goal as New Jersey Devils' Alexei Ponikarovsky (12) celebrates his game-winning score with teammate Andy Greene as Philadelphia Flyers' Wayne Simmonds skates past during overtime of Game 3 of a second-round NHL hockey Stanley Cup playoff series, Thursday, May 3, 2012 in Newark, N.J. The Devils won 4-3 and took a 2-1 lead in the series.
Los Angeles Angels starting pitcher Jered Weaver throws to the plate during the second inning of their baseball game against the Minnesota Twins, Wednesday, May 2, 2012, in Anaheim, Calif. Weaver threw a no-hitter against the Twins Wednesday.
Los Angeles Angels starting pitcher Jered Weaver is doused with beer by teammates after pitching a no-hitter against the Minnesota Twins, Wednesday, May 2, 2012, in Anaheim, Calif. The Angels won 9-0.
Washington Nationals' Ian Desmond celebrates with teammates after hitting a game-winning, two-run home run during the ninth inning of a baseball game against the Arizona Diamondbacks, Wednesday, May 2, 2012, in Washington. Bryce Harper scored on the play, and the Nationals won 5-4.
New York Rangers right wing Marian Gaborik (10) celebrates his winning goal against the Washington Capitals with teammates Carl Hagelin (62) and Marc Staal (18) during the third overtime period of Game 3 of an NHL Stanley Cup second-round playoffs, in Washington, early Thursday, May 3, 2012. The Rangers beat the Capitals 2-1.
San Antonio Spurs' Tim Duncan, center, reacts on the bench during the fourth quarter of Game 2 of a first-round NBA playoffs against the Utah Jazz, Wednesday, May 2, 2012, in San Antonio. San Antonio won 114-83. Tony Parker is at left, and Boris Diaw is right.
Phoenix Coyotes goalie Mike Smith looks back at the net as Nashville Predators right wing Patric Hornqvist (27) celebrates a goal by teammate David Legwand in the first period of Game 3 in an NHL Stanley Cup Western Conference semifinal playoffs. Wednesday, May 2, 2012, in Nashville, Tenn. The Predators won 2-0.
Pittsburgh Pirates catcher Rod Barajas gestures as he continues to argue after being thrown out of the game by home plate umpire Angel Campos, not seen, in the second inning of a baseball game against the St. Louis Cardinals on Wednesday, May 2, 2012, in St. Louis. Umpire Dale Scott is at right.
Phoenix Coyotes right wing Shane Doan (19) checks Nashville Predators right wing Matt Halischuk into the Coyotes' bench during the third period of Game 3 in an NHL Stanley Cup Western Conference semifinal playoffs on Wednesday, May 2, 2012, in Nashville, Tenn. The Predators won 2-0.
St. Louis Cardinals' Rafael Furcal, right, steals second as Pittsburgh Pirates second baseman Neil Walker awaits the throw during the second inning of a baseball game Wednesday, May 2, 2012, in St. Louis.
Jockey Calvin Boral takes Kentucky Derby entrant Take Charge Indy for a morning workout at Churchill Downs Wednesday, May 2, 2012, in Louisville, Ky.
San Diego Chargers football fan Paul Camacho wears the uniform of Junior Seau as he stands in front of the team's headquarters, Wednesday, May 2, 2012, in San Diego. Former NFL star Junior Seau was found shot to death at his home Wednesday morning in what police said appeared to be a suicide. He was 43.
Horses workout before the sun come up at Churchill Downs Wednesday, May 2, 2012, in Louisville, Ky.
WBA world champion Vyacheslav Senchenko, left, of Ukraine received a punch from challenger Paul Malignaggi of USA during their WBA World welterweight title fight in Donetsk, Ukraine, April 29, 2012. Paul Malignaggi won the fight.
Toronto Blue Jays third baseman Brett Lawrie leaps into the crowd to catch a foul pop fly by Seattle Mariners' Munenori Kawasaki during the ninth inning of a baseball game in Toronto, April 29, 2012.
Philadelphia Flyers left wing James van Riemsdyk, right, skates away after scoring a goal as New Jersey Devils defenseman Andy Greene, left, reacts in the second period of Game 1 in a second-round NHL Stanley Cup hockey playoff series, April 29, 2012, in Philadelphia. The Flyers won 4-3 in overtime.
Atlanta Hawks' Josh Smith, center, is fouled by Boston Celtics' Brandon Bass while chasing down a loose ball next to Celtics' Kevin Garnett, left, during the fourth quarter of Game 1 of an opening-round NBA basketball playoff series, April 29, 2012, in Atlanta. Atlanta won 83-74.
Inter Milan forward Mauro Zarate, center, of Argentina, scores a goal as Cesena goalkeeper Francesco Antonioli, left, tries to stop the ball during the Serie A soccer match between Inter Milan and Cesena at the San Siro stadium in Milan, Italy, April 29, 2012.
Utah Jazz's Paul Millsap (24) and San Antonio Spurs' Tim Duncan (21) reach for a rebound during the fourth quarter of Game 1 of a first-round NBA playoffs, April 29, 2012, in San Antonio. San Antonio won 106-91.
New York Mets' David Wright slides safely into third base as he advances on a single by Lucas Duda against the Colorado Rockies in the 11th inning of the Mets' 6-5 victory in a baseball game in Denver, April 29, 2012. Wright went on to score the go-ahead run on a single by Ike Davis.
IndyCar driver Will Power, of Australia, right, celebrates his victory at the winner's podium with Ryan Hunter-Reay, of the U.S, who places second, in the IndyCar Sao Paulo 300, in Sao Paulo, Brazil, April 29, 2012.
Washington Nationals right fielder Bryce Harper catches a fly ball from Los Angeles Dodgers' Juan Uribe during the fourth inning of a baseball game in Los Angeles, April 29, 2012.
New York Rangers' Marc Staal (18) gets control of the puck as teammate Ryan Callahan (24) checks Washington Capitals' Matt Hendricks (26) during the first period of Game 1 in the second round of the NHL Stanley Cup playoffs, April 28, 2012, in New York. The Rangers won the game 3-1.
Chicago Bulls guard Derrick Rose (1) reacts after an injury during the fourth quarter of Game 1 in the first round of the NBA basketball playoffs against the Philadelphia 76ers in Chicago, April 28, 2012. Rose scored 23 points before being helped off the court late in Chicago's 103-91 victory. He will miss the remainder of the season with a torn ACL.
Chicago Cubs' Randy Wells pitches in the second inning of a baseball game against the Philadelphia Phillies, April 28, 2012, in Philadelphia.
Detroit Tigers' Austin Jackson, bottom, collides with New York Yankees shortstop Eduardo Nunez while stealing second base during the first inning of a baseball game, April 28, 2012, in New York.
J.J. Yeley (17) hits the wall in Turn 4 during the NASCAR Nationwide Series auto race at Richmond International Raceway in Richmond, Va., April 27, 2012.
St. Louis Cardinals' Jon Jay, center, beats out a throw from Milwaukee Brewers third baseman Aramis Ramirez, left, as Mat Gamel, right, covers first during the fifth inning of a baseball game, April 28, 2012, in St. Louis.
Daniel Chopra, of Sweden, hits out of a lagoon back onto the ninth green during the third round of the Zurich Classic golf tournament at TPC Louisiana in Avondale, La., April 28, 2012.
Los Angeles Dodgers' Matt Kemp celebrates after hitting a walk-off home run in the tenth inning of their baseball game against the Washington Nationals, April 28, 2012, in Los Angeles. The Dodgers won 4-3.
Bernd Wiesberger of Austria kisses the trophy after winning the Ballantine's Championship golf tournament at the Black Stone Golf Club in Icheon, South Korea, April 29, 2012.
Georgia Tech wide receiver Stephen Hill celebrates as NFL Commissioner Roger Goodell, right, and Wesley Welker, left, watch after Hill was selected 43rd overall by the New York Jets in the second round of the NFL football draft at Radio City Music Hall, April 27, 2012, in New York.
Phoenix Coyotes' Mikkel Boedker celebrates his goal as he skates on one knee with Keith Yandle (3) and Shane Doan (19) while Nashville Predators' Roman Josi (59) and goalie Pekka Rinne (35), skate by during the second period of Game 1 in an NHL Stanley Cup Western Conference semifinal playoffs, April 27, 2012, in Glendale, Ariz.
Brazil's Thiago Machado Pereira competes to win the men's 400m medley final at the Maria Lenk Trophy Swimming Championship in Rio de Janeiro, Brazil, April 27, 2012.
Detroit Tigers third baseman Miguel Cabrera, left, tags out New York Yankees' Raul Ibanez on a fielder's choice during the sixth inning of a baseball game, April 27, 2012, at Yankee Stadium in New York.
A spectator catches a foul ball off the bat of Pittsburgh Pirates' Garrett Jones as Atlanta Braves third baseman Chipper Jones (10) looks on in the fourth inning of a baseball game, April 27, 2012, in Atlanta.
A fan dives into home plate in front of umpire Jeff Kellogg in the middle of the seventh inning of a baseball game between the Oakland Athletics and the Baltimore Orioles in Baltimore, April 27, 2012.
David Ferrer of Spain returns the ball to Milos Raonic of Canada during their semifinal match in the Barcelona open tennis in Barcelona, Spain, April 28, 2012. Ferrer won 7-6, 7-6.
Bull rider Elliot Jacoby of Fredericksburg, Texas is thrown nearly under Holly Rollerin the PBR Touring Pro Division competition, during the 98th Annual Clovis Rodeo,April 26, 2012 in Clovis, Calif.