On the Wednesday before the 2012 U.S. Open, Dustin Johnson threw out the first pitch at a Giants-Astros game. Johnson also drove a golf ball into McCovey cove with Giants pitcher Matt Cain. That night, Cain went on to throw the first perfect game in Giants history.
2 of 18Jeff Chiu / AP
Rory McIlroy threw the ceremonial first pitch at the San Francisco Giants home game against the Houston Astros on the Tuesday before the 2012 U.S. Open .
3 of 18Jeff Chiu / AP
McIlroy will attempt to defend his U.S. Open title at Olympic Club in San Francisco.
4 of 18Jeff Chiu / AP
McIlroy bobbleheads were also created for the event at the stadium -- it was Irish Heritage Night.
5 of 18CJ Gunther/EPA
2011 PGA champion Keegan Bradley, a life-long Red Sox fan, threw out the first pitch at the Red Sox/Yankees game on Tuesday.2011 PGA champion Keegan Bradley, a life-long Red Sox fan, threw out the first pitch at the Red Sox/Yankees game.
6 of 18CJ Gunther/EPA
Two days later, Phil Mickelson took to the mound.
7 of 18Brian Snyder/Reuters
Mickelson also took batting practice before throwing out the first pitch.
8 of 18CJ Gunther/EPA
Jack Nicklaus also threw out the first pitch at a Red Sox/Yankees game at Fenway Park in July 2008.
9 of 18Tim Sharp/AP
Tiger Woods is a Dodgers fan, but he threw out the first pitch at a Indians/Rangers game while in Texas for the Byron Nelson in May 1997.
10 of 18H. Rumph Jr./AP
While in Pennsylvania for the 2009 U.S. Women's Open, Paula Creamer threw out the first pitch at a Reds/Phillies game.
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Natalie Gulbis warmed up before throwing out the first pitch at a Rangers/A's game in September 2009.
12 of 18Lee Jin-man/AP
In April 2006, Michelle Wie threw out the first pitch at a Doosan Bears/SK Wyverns game in South Korea.
13 of 18Hans Deryk/Reuters
After leading the U.S. team to victory at the 2008 Ryder Cup, captain Paul Azinger threw out the first pitch at a Rays/White Sox game.
14 of 18Frank Franklin II/AP
Shortly after announcing her retirement in May 2008, Annika Sorenstam threw out the first pitch at a Mets/Nationals game.
15 of 18Elaine Thompson/AP
While she was at the University of Washington, Paige Mackenzie threw out the first pitch at a Rays/Mariners game in 2006.
16 of 18Ray Stubblebine/Reuters
Lucas Glover, a fan of the Yankees and winner of the 2009 U.S. Open at Bethpage Black, threw out the first pitch at a Yankees/Rangers game.
17 of 18Bill Kostroun/AP
2010 U.S. Ryder Cup captain Corey Pavin also threw out the first pitch at Yankee Stadium.
18 of 18Eric Risberg/AP
Juli Inkster, the 1999 U.S. Women's Open champ, got a hug from San Francisco Giants pitcher Shawn Estes after throwing out the first pitch at a Giants/Angels game.
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