Peyton Manning, quarterback for the Denver Broncos, has denied allegations that he used a banned drug during his recovery from neck surgery in 2011.
A claim was made in an Al Jazeera investigation into doping in sport, which is due to be broadcast on Sunday, that Manning was treated with a human growth hormone during his recovery.
According to the report, Manning was given the banned substance by an Indianapolis clinic, which sent it to his wife.
— Huffington Post (@HuffingtonPost) December 27, 2015
The 39-year-old quarterback was quick to deny the claim.
"The allegation is complete garbage," he said in a statement. "It never happened."
Peyton Manning missed the 2011 season as quarterback for the Indianapolis Colts with a neck injury and joined the Broncos in 2012.
"I really can't believe somebody would put something like this on the air," he said. "Whoever said this is making stuff up."
Al Jazeera is claiming that British masters athlete Liam Collins, who was working undercover for the report, spoke to Charlie Sly, a Texas-based pharmacist who worked at Indianapolis anti-ageing clinic the Guyer Institute in 2011.
— Hollywood Reporter (@THR) December 27, 2015
Sly allegedly names Manning and several other athletes as having received HGH from the clinic.
In a later statement to Al Jazeera, Sly said Collins recorded his conversations without his knowledge or consent and the recorded conversation is false.
"The statements on any recordings or communications that Al Jazeera plans to air are absolutely false and incorrect.
"Under no circumstances should any of those recordings, statements or communications be aired," he added.
— Yahoo Sports (@YahooSports) December 27, 2015
Manning won the Super Bowl with the Indianapolis Colts in 2006 and is statistically the most successful quarterback in NFL history, according to the BBC.
He holds the records for most passing yards and touchdown passes and has been voted the league's most valuable player on a record five occasions.
Peyton Manning is currently sidelined with a foot injury.