Theoretically, Avril's injury represents what the concussion protocol looks like when it's properly conducted. However, during the fourth quarter of the game, Patriots receiver Julian Edelman took a vicious hit from Seahawks safety Kam Chancellor that rendered him dazed. As the replays spun, a former league official tweeted that Chancellor should have been flagged for a penalty for the helmet-to-helmet hit, a rule that the league has enacted to stem concussions.

A reporter from the Detroit Free Press stoked the conspiracy:

Can hear the independent medical doctors in the box radio to the sideline saying Edelman needs to be checked for cocnussion — Dave Birkett (@davebirkett) February 2, 2015

Edelman stayed in the game and a few plays later, got up looking a little less than steady after another catch. Birkett later wrote that even after the drive, which resulted in a Patriots touchdown, "a medical observer was overheard radioing someone a second time saying Edelman needed to be examined." (On Monday, "a person with knowledge of the situation" told the AP that Edelman was later tested on the sideline although, unlike Avril, Edelman never went to the locker room.) Edelman went on to score the game-winning touchdown.

In a post-game interview, Edelman was asked about the hit. "We're not allowed to talk about injuries," he told reporters. As ESPN noted, Edelman also "at one point referred to 'Seattle' as 'St. Louis' before correcting himself."

Following the game, The Onion ran a piece with the particularly devastating headline "Super Bowl Confetti Made Entirely From Shredded Concussion Studies." Glibness notwithstanding, this sentiment speaks to the enduring problem of concussions, a manifestation of the game's violence, which has given the pro football its first real existential crisis.

In the past few years, former players, league observers, and fans alike have become increasingly vocal about the issue of brain trauma in a manner that some say could irrevocably turn the culture of football fandom against the sport. (Meanwhile, last week, an anonymous poll of NFL players concluded that 85 percent of players would opt to play in the Super Bowl with a concussion.)

Edelman and Avril weren't the only symbols of the NFL's problems on display at Super Bowl XLIX. The league's other image crisis has centered on a recent spate of off-the-field incidents involving domestic violence. In the aftermath of abuse scandals involving league stars Ray Rice and Adrian Peterson—the most high-profile acts of misconduct in a handful of them this season—the last thing the league needed was for the specter of violence to tarnish the year's biggest game.

But shortly after Malcolm Butler, the Patriots rookie and unlikely Super Bowl savior, sealed his team's title with an incredible last-second interception at the goal line, the game was delayed again by a massive brawl. As Super Bowl skirmishes go, this one was unprecedented in its scope. In the end, Seattle Seahawks linebacker Bruce Irvin became the first player to ever be ejected from a Super Bowl.