The doctor who allegedly provided Peyton Manning with human growth hormone released a statement in support of the Broncos quarterback on Sunday afternoon.

An Al Jazeera report that first surfaced late Saturday said Manning was among a number of prominent athletes to receive performance-enhancing drugs from the Indianapolis-based Guyer Institute. However, Dr. Dale Guyer suggested Charles Sly, the source in this report, had no evidence to back up what he said.

"I have no reason to believe these allegations are based in fact or have any truth. In fact, I can say with absolute certainty they are not," Guyer said in the statement, via Bleacher Report's Jason Cole. "I find it extremely disturbing that the source of Al Jazeera's story, a former unpaid intern named Charles Sly, would violate the privacy of Mrs. Manning's medical records and be so callous and destructive as to purposely fabricate and spread stories that are simply not true. I would emphasize that Mr. Sly was never an employee of the Guyer Institute and his brief three-month internship occurred in 2013 during which time Peyton was not even being treated or present in the office. I think it is obvious that Mr. Sly fabricated this whole thing for reasons I cannot fathom. I am proud to have treated Peyton and helped him through his rehabilitation. Mr. Manning is one of the most honorable and upstanding individuals I have had the pleasure of knowing."

Sly himself actually said he made up this entire thing as a way to test Liam Collins, the reporter who secretly recorded conversations with him. Manning, the Broncos and the Colts have all since publicly denounced the Al Jazeera report.

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In addition, Cole reports the NFL will investigate Manning in the wake of this report. As the Deflategate saga proved last spring, that investigation could be a long, grueling process.