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DENVER — A documentary on doping drug usage in sports allegedly has linked Broncos quarterback Peyton Manning to usage of human growth hormone, according to the Huffington Post.

The Al Jazeera report, “The Dark Side: Secrets of the Sports dopers,” claims to expose widespread usage of performance-enhancing drugs in professional sports through an undercover investigation. The report airs Sunday, but Huffington Post claims that they have received an advance screening of the documentary and that Manning was name-dropped in connection with doping drugs.

Charlie Sly, a pharmacist who worked at the Indiana-based anti-aging clinic Guyer Institute in 2011, allegedly said in a secret video used in the report that he was  “part of a medical team that helped [Manning] recover” from a neck surgery that forced Manning to miss the entire 2011 season while playing for the Colts.

Sly claims that the clinic mailed the human growth hormone, along with other drugs, always under the name of Manning’s wife, Ashley Manning, so that the quarterback’s name was never connected to the shipments.

“All the time we would be sending Ashley Manning drugs,” Sly says in the video. “Like growth hormone, all the time, everywhere, Florida.”

Sly also claims on the undercover video that both Mannings visited the clinic after hours to receive intravenous treatments.

Human growth hormones were banned by the NFL in 2011 as part of its collective bargaining agreement with players, but the league did not start testing until 2014. No player has ever tested positive.

In the report, Manning’s agent told Al Jazeera that Sly’s allegations were “outrageous and wrong,” but the statement does not deny that the hormone was shipped to Manning’s wife.

“Any medical treatment received by Ashley is a private matter of hers, her doctor, and her family,” the agent said.

Manning himself released a personal statement on the matter via the Broncos late Saturday:

“The allegation that I would do something like that is complete garbage and is totally made up.  It never happened.  Never.  I really can’t believe somebody would put something like this on the air.  Whoever said this is making stuff up.”

The Al Jazeera report airs Sunday at 7 p.m. Mountain Time.