Damar Hamlin's presence at the Bills' playoff game has fueled wild conspiracies on the internet among the tin foil hat-wearing crowd ... with some suggesting a body double was used in the 24-year-old safety's place.
But, multiple sources tell TMZ Sports that's simply not true ... sorry, conspiracy theorists.
Hamlin attended the Bills-Bengals game Sunday afternoon at Highmark Stadium ... his first time back at an NFL game since he went into cardiac arrest on the field in Cincinnati on January 2.
Damar, wearing a mask, hoodie, and sunglasses, was shown on television and the stadium scoreboard .