NFL spokesperson denies non-cooperation with MLB, USADA in Manning investigation

NFL spokesman Greg Aiello vehemently denied a report that the league refused to cooperate with the MLB and United States Anti-Doping Agency (USADA) in an investigation into the HGH allegations made by Al Jazeera.

Al-Jazeera released a documentary on Dec. 27 titled "The Dark Side: Secrets of the Sports Dopers" that alleged HGH was sent to Peyton Manning's house, while the five-time NFL MVP recovered from neck surgery in 2011.

The documentary also alleged that several MLB players received illicit substances, including Philadelphia Phillies first baseman Ryan Howard and Washington Nationals first baseman Ryan Zimmerman.

"We are working with MLB and USADA. The review is ongoing and comprehensive. It involves obtaining and reviewing numerous records, conducting multiple interviews and working with other entities. We do not comment on the specifics of these matters until the review is completed," NFL spokesman Brian McCarthy said, according to ESPN's T.J. Quinn.

Quinn alleged that the NFL would not coordinate with the MLB and USADA, and responded to Aiello that the league is merely communicating with both parties. Aiello retorted that Quinn was wrong, and was entering a battle of semantics.