That's a really good theory! I can definitely see something kicking off after a football game, especially because it looks like the Houston Texans lost the game

Wish I knew where this guy was found! Kind of unusual for NamUs not to provide a location, they usually give an approx address (the coordinates that come up w/ Google Maps are always wayyyy off). I can confirm though that the arena where the game was taking place and the hospital he was brought to (I'm guessing they would have brought him to the nearest hospital?) are very close - 10 min drive.
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I will say though that the
shaved design on the side of one's head is really in-style with young men at the moment. A star is a common design because it's easy for the barber (only straight lines!)

I'm guessing it's even more popular in Texan barbershops, because the big star in their flag. So, it's possible it's unrelated to affiliation w/ a sports team