I liked the concept of the story -- that aliens could only communicate with a human who was concussed. But why pick THAT guy in particular? Why not just broadcast to everyone who was concussed in the entire Miami area?
However...
When I write, or talk about writing with my crit group, I always stress this point: get the small stuff right and the big stuff won't matter. So, when I wrote my novel, I made sure to be very careful about what bus routes the MC's apartment were near, the floor plan, etc. In my groupmate's fantasy novel, I'm always getting on her about how long a human pre-teen can walk in a day. That sort of thing.
That said... I'm a huge American football fan. I found so many issues with the way the football portion was technically described that I just kept getting pulled out of the story. To wit:
* If a player is injured and the team takes an injury time-out, said player must leave the game for a play and, if it's in the last two minutes and no time-outs are available, then ten seconds are taken off the clock. This means Tyler wouldn't have been in for consecutive plays unless the coach or QB (as team captain on the field) called time-out, and even then, with the way the NFL is about concussions these days, the team would have pulled Tyler rather than face massive fines and restrictions for letting him play.
* It's not very easy to get 22 points in football -- a TD is worth six, but usually seven because the extra point is a gimme. Field goals are worth 3. It is possible to get a two-point conversion after a TD, but given that the other team had 27, I can't see a reason Tyler's team would go for two even if they were mounting a comeback. Unless somehow Tyler's team got a safety early on in the game (which is possible, but not likely, as safeties are rare), 22 is a very strange point total to have.
* Linebacker numbers are 50-59, and then 90-99, and then, if the team somehow has all those numbers taken, I believe it goes 40-49. I've never in my life seen an NFL-level linebacker with a number in the 30s. Therefore, "old number 32" was more likely a safety (a la Troy Polamalu or Ed Reed), not a linebacker. Also, in a situation where you have to throw the ball downfield to make a comeback, the safety would probably be in coverage and the defense would be playing a three- or four-man line so that they'd outnumber the offensive players who could catch the ball (a maximum of five) by at least two.
* Rollins was called a runningback. RBs generally don't go downfield. They're usually the checkdown guy. Until he was named as an RB, I saw Rollins as a WR or really talented TE. I know the RB sometimes goes downfield, and more and more these days they get split out as WRs, but in a situation like this the coach would probably have the guys with the best hands and the best size to beat the defenders if they had to go up for a hail-mary.
* The odds of a third-string QB in the Superbowl at the last minute are highly unlikely. Not impossible, but unlikely. Plus, even if Tyler goes down, there'll still be SOMEONE on the team who can chuck the ball. Maybe not as well as a trained QB, but if you watch NFL practices before games, you do often see RBs, WRs, and TEs throwing the balls back to the QB.
So -- good concept, distracting execution.