Perhaps the funniest photo from week one of the NFL season is the shot, below, of Elvis Presley — along with one Rocky Balboa — gracing the Philadelphia Eagles sideline during Monday Night Football. It's a goofy photo, but there's actually a perfectly logical explanation for what Elvis the Pelvis is doing there, which we'll get to in a second.
First, however, behold the bizarre spectacle:
Rob Carr/Getty Images
Now that you've soaked that in, here's the deal: The Eagles' new coach is Chip Kelly, who brings his high-powered, super-speedy offense with him to Philadelphia from the University of Oregon. But all that on-field explosiveness takes some advanced disguising to work without opposing defenses stealing plays. So, instead of using hand signals or some other means of communication, Kelly and his coaching staff use oversized cards of random people and personalities to signal on-field tactics.
But Rocky and Elvis weren't the only ones who showed up on Monday night. Check out a couple of other folks who made appearances, as well:
Did anyone ends catch the Fresh Prince sign on the sideline? #eagles pic.twitter.com/qCRZTjmtMM
— mtgdesigns (@mtgdesigns) September 10, 2013

Pretty unique, to be sure, but this actually isn't a new thing for Kelly. He relayed plays in similar fashion while at Oregon, as shown in these two photos:
Steve Dykes/Getty Images
Steve Dykes/Getty Images
So there you have it, casual sports observer. Next time a co-worker at the watercooler asks what the heck the Fresh Prince of Bel-Air is doing in an NFL game, you'll have the answer. No need to thank us, though; just pay it forward.
Homepage image: Rob Carr/Getty Images