Denver Broncos player Peyton Manning is denying claims he took human growth hormone. That’s despite a report by Al-Jazeera, who say an anti-aging clinic in Indianapolis provided the substance. Manning says he visited the clinic to use a hyperbaric chamber and receive various other treatments, following neck surgery in 2011. The Broncos say they support the 39-year old quarterback 100%. Al-Jazeera’s documentary on doping is sending waves through baseball – the Major League says it will investigate claims that several of its players took banned hormone supplement Delta-2. Lawyers for the players refute the charges.

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