OK, so that probably isn't the real reason, but Mike Wobschall of Vikings.com confirmed that All Day will indeed live up to his nickname next Sunday against the San Francisco 49ers:
And with that, the preseason just got a little bit more exciting.
It's not as though Peterson is in desperate need of preseason reps. He didn't receive any last year as he rehabbed from a torn ACL, and he still had a pretty decent season.
And by "pretty decent," I mean carrying the ball 348 times for 2,097 yards (6.0 per carry) and 12 rushing touchdowns in what was one of the most transcendent, unbelievable, this-guy-isn't-human individual seasons of all time.
Some players often need those preseason repetitions to get back into game shape or find their rhythm, but the Vikes know that Peterson will be ready to shine once the games count—no matter how many snaps he has taken beforehand.
Still, with Peterson healthy, it won't hurt to get him some carries against what was one of the best run defenses in the NFL last year. The third game of the preseason is usually when we see most of the starters for the longest amount of time, and can be a precursor to the regular-season lineups.
Whether that means him getting three, five or 10 carries remains to be seen. But it will definitely be something to watch as Purple Jesus gears up for an encore to last year's thrilling show.