This year (2011) Robinson Cano won it.
Angels Garret Anderson won the 2003 All Star game Home Run Derby.
Baltimore Orioles Miguel Tejada won the 2004 All Star game Home Run Derby.
Los Angeles Angels Vladimir Guerrero won the 2007 All Star game Home Run Derby.
New York Yankees Jason Giambi won the 2002 All Star game Home Run Derby.
Robinson Cano of the New York Yankees.
Justin Mornuer Justin Mornuer
Arizona Diamondbacks Luis Gonzalez won the 2001 All Star Home Run Derby.
Ken Griffet Jr. won the 1999 All Star game home run derby.
Vladimir Guerrero won the home run derby in 2007.
Ken Griffey Jr. is only one I know about
Minnesota Twins Justin Morneau won the 2008 All Star game Home Run Derby.
David Ortiz won the Home Run Derby in 2010.