Baltimore scored 17-points off of Manning's turnovers. An INT for a TD, a fumble recovery that led to a TD, and a bizarro INT that led to the game-ending FG. He also had another fumble stricken by a Baltimore penalty. You know, it'd be different if Manning was playing great, but he was as underwhelming as the rest of the team. If it weren't for Holliday I seriously doubt this game would have been that close. Hell, if Jacboy Jones ran two TDs back on Denver this game would have been a ****ing blowout by comparison.
People are upset with Manning because he has an image of being a playoff choke artist, which he is, and this game kinda reaffirmed it. He's not the only reason Denver lost, but he didn't do it a ton of favors, either.