A top candidate to win the NL Cy Young in 2010, Halladay produced his signature performance as a Phillie, striking out 11 Marlins and notching the 20th perfect game in MLB history in the Phillies 1-0 win over the Marlins on May 29. Florida catcher Ronny Paulino made the 27th and final out, grounding to third base, clinching one of the most historic achievements in Philadelphia sports history.
2 of 24Winslow Townson/SI
Boston designated hitter David Ortiz breaks his bat during a ground out to second in the opening night game April 4 at Fenway Park in Boston. Ortiz went 0-3 with a walk as the Red Sox won 9-7.
3 of 24David E. Klutho/SI
Dodgers first baseman James Loney falls into the stands while running after a foul ball hit by the Pirates' Andy LaRoche in the seventh inning of an April 5 game in Pittsburgh. Loney couldn't make the play, and the Pirates defeated the Dodgers 11-5.
4 of 24Harry How/Getty Images
Kendry Morales of the Los Angeles Angels celebrates his walkoff grand slam in a 5-1 win over the Seattle Mariners May 29 in Anaheim. Unfortunately, Morales broke his leg during the celebration at home plate.
5 of 24Brad Mangin/MLB Photos via Getty Images
Braden was perfect on Mother's Day, recording the first perfect game for Oakland in 42 years in the A's 4-0 win over Tampa Bay on May 9. He was also the beneficiary of some flashy glovework, courtesy of Kevin Kouzmanoff, who sprinted to the dirt in front of Oakland's dugout to catch a foul popup by Dioner Navarro for the second out in the sixth. The left-hander pointed to the sky in honor of his single mom, Jodie Atwood, who died of skin cancer when he was a high school senior. He shared a long and tearful hug with his grandmother Lindsey, who helped raise him, in front of the dugout.
6 of 24Winslow Townson/SI
Cameron Connors (left) of Rutland, Mass., and Arthur Esposito of Holden, Mass., bask in a ray of late afternoon sun before the April 4 baseball season opener at Fenway Park. The Red Sox defeated the Yankees 9-7.
7 of 24Al Tielemans/SI
Tampa Bay Rays catcher John Jaso is late with the tag as Oakland Athletics outfielder Ryan Sweeney blurs the 3rd base chalk line and is safe on a sacrifice fly to center by Gabe Gross in the third inning of their game at Tropicana Field on April 27 in St. Petersburg, Florida. Tampa Bay defeated Oakland 8-6.
8 of 24Cliff Welch/Icon SMI
Umpire Bob Davidson has a few words with Rays manager Joe Maddon after Davidson ejected Maddon and Carl Crawford during the May 25 game between the Boston Red Sox and Tampa Bay at Tropicana Field in St. Petersburg.
9 of 24Kevork Djansezian/Getty Images
The Twins' Denard Span crashes against the center field wall as he chases a double hit by Hideki Matsui during their game at Anaheim on April 7.
10 of 24Damian Strohmeyer/SI
Red Sox catcher Victor Martinez tags out left fielder Randy Winn of the Yankees, who tried to score on a single by Francisco Cervelli in the fourth inning of their May 8 game at Fenway Park in Boston. The Yankees defeated the Red Sox 14-3.
11 of 24Rod Mar/SI
Seattle Mariners' left fielder Eric Byrnes is tagged out at home by Detroit Tigers catcher Alex Avila in the second inning of their game on April 18 in Seattle. Byrnes was thrown out at home while attempting to score on a single by teammate Casey Kotchman.
12 of 24Tim DeFrisco/SI
Colorado's Carlos Gonzalez scores on a sacrifice fly as Carlos Ruiz is late with the tag on May 12 at Coors Field in Denver. The Rockies defeated the Phillies 4-3 in 10 innings.
13 of 24Damian Strohmeyer/SI
Yankees left-hander Andy Pettitte loses the ball and his glove while trying to cover first on a grounder by Jacoby Ellsbury on April 7 in Boston.
14 of 24Simon Bruty/SI
The Cubs' Mike Fontenot slides past Brian McCann to score on a sacrifice fly by Ryan Theriot. The Braves defeated Chicago 3-2 on April 7 in Atlanta.
15 of 24Darren Carroll/SI
The Rangers' Matt Treanor tags out Seattle's Casey Kotchman during Texas' 9-2 home victory on April 11.
16 of 24Rod Mar/SI
Rightfielder Ichiro Suzuki is introduced prior to the Seattle Mariners' home opener against the Oakland Athletics at Safeco Field on April 12.
17 of 24Darren Carroll/SI
Texas Rangers short stop Elvis Andrus is mobbed after his game-winning single in the ninth against the Detroit Tigers on April 23 at Rangers Ballpark. The Rangers won 5-4.
18 of 24J. Meric/Getty Images
Outfielder Gabe Kapler of the Tampa Bay Rays scores a run against the Toronto Blue Jays at Tropicana Field on April 23 in St. Petersburg. The Blue Jays defeated the Rays 6-5.
19 of 24John Iacono/SI
Jose Reyes of the Mets steals second as Atlanta Braves' second baseman Omar Infante misses the ball on catcher's David Ross's throwing error in the sixth inning. Reyes advanced to third on the error en route to a 3-1 home victory on April 24.
20 of 24Elsa/Getty Images
Boston Red Sox shortstop Marco Scutaro leaps to catch a throw as Carl Crawford of the Tampa Bay Rays steals second base during their game on April 16 at Fenway Park in Boston.
21 of 24Andy Lyons/Getty Images
Angel Pagan of the New York Mets slides safely into second under Brandon Phillips of the Cincinnati Reds in a 5-4 loss by the visitors at Great American Ballpark on May 5.
22 of 24Ezra Shaw/Getty Images
Lance Berkman of the Houston Astros warms up on the on deck circle during an 8-2 win over the Giants at AT&T Park on May 14 in San Francisco.
23 of 24John Biever/SI
Florida's Brett Hayes is out at second as St. Louis shortstop Brendan Ryan fails to turn the double play during the seventh inning of their May 20 game in St. Louis. The Marlins' Bryan Petersen was safe at first.
24 of 24John Biever/SI
Chicago Cubs shortstop Starlin Castro is safe at first as the throw pulls St. Louis first baseman Albert Pujols off the bag during the Cardinals 7-1 victory on May 28 at Wrigley Field.
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