Seven-time Tour de France winner Lance Armstrong gave $5 million to his foundation, which helps people affected by cancer. A cancer survivor himself, Armstrong recently announced a comeback to cycling.
J. Scott Applewhite, AP
Michael Jordan pledged $5 million to help upgrade Hales Franciscan High School, a historically African-American all-boys school in Chicago. Considered the greatest player ever, Jordan is a part owner of the NBA's Charlotte Bobcats.
Rick Havner, AP
The University of Arizona received $3.5 million from Milwaukee Bucks' Richard Jefferson. The veteran forward entered the NBA in 2001 and helped the Nets to two Eastern Conference titles.
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A $5 million gift from former NHL star Eric Lindros, to support the London Health Sciences Centre, is one of the largest one-time donations to the hospital. The 16-year veteran retired from hockey last season.
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World No. 1 golfer Tiger Woods gave over $1.3 million on behalf of his learning center to help with the education of children. Woods has won 14 major championships, including this year's U.S. Open.
Denis Poroy, AP
Through his foundation, tennis great Andre Agassi pledged $1.3 million to help at-risk children. The former No. 1 ranked tennis player won eight grand-slam titles.
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Former professional wrestler and now Hollywood movie star, Dwayne 'The Rock' Johnson, donated $1 million to The University of Miami's football facilities renovation fund.
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NBA All-Star Tracy McGrady, a strong voice for Stand up for Darfur, a program aimed at improving education for Sudanese refugees, gave $1 million to the project.
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Mike Miller and his wife began an endowment fund to support Sanford Children's Hospital in South Dakota. Miller, a longtime Grizzlies guard, was traded to the Timberwolves at the end of last season.
Stephen Dunn, Getty Images
NBA legend Jerry West and his wife contributed $800,000 to West Virginia University. The Hall of Famer was voted as one of the 50 Greatest Players in NBA history in 1996.
Micheal Switzer, AP