The NFL is conducting a comprehensive review of allegations that Denver Broncos quarterback Peyton Manning had human growth hormone delivered to his house, according to the Associated Press.
The story, published on NBCSports.com, says the NFL's investigation has been going on for weeks. It involves "reviews of records, interviews and coordination with other agencies," according to a league spokesperson.
Al Jazeera reported last month that Manning's wife, Ashley, received deliveries of HGH while Manning was rehabbing from neck surgery.
The league says the review is not expected to be completed by Super Bowl 50, where Manning's Broncos meet the 17-1 Carolina Panthers.