Denver Broncos quarterback Peyton Manning denies HGH use

As Denver Broncos quarterback Peyton Manning fights to return from a foot injury, he's now taking on another fight: allegations of performance-enhancing drug use back in 2011 when he was recovering from neck surgery as an Indianapolis Colt.

A film called "The Dark Side," set to air on Al-Jazeera America, alleges an Indianapolis drug ring supplied Manning with HGH.

In the movie, a man secretly being taped claims Manning regularly received the drugs under his wife's name.

Sunday morning on ESPN, a defiant Manning addressed the claims made in that documentary.

"Disgusted is how I feel. Sickened by it. I'm not sure I understand how someone can make something up about somebody, admit he's made it up and yet somehow it gets published in a story. I don't understand that. Maybe you can explain it to me, somebody else can. It's completely fabricated,” Manning said.

Charlie Sly was cited in the report as the pharmacist who had supplied the substances, but he later denied the report saying he dropped athletes' names simply to test an undercover reporter.