• American football legend Peyton Manning has denied a claim he was treated with human growth hormone during his recovery from neck surgery in 2011.

    Peyton Manning
    LAST UPDATE : Dec 28, 2015, 7:44 AM EST
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  • Source: Egor Fedorov/flickr

    Russia's athletics federation was banned by the International Association of Athletics Federations for alleged involvement in widespread doping.

    LAST UPDATE : Dec 30, 2015, 7:16 AM EST
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  • Ryan Howard

    Ryan Zimmerman of the Washington Nationals and Ryan Howard of the Philadelphia Phillies ave filed defamation lawsuits against Al Jazeera America over statements made in a documentary about performance-enhancing drugs in sports.

    LAST UPDATE : Jan 06, 2016, 6:30 AM EST
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