Watching Adrian Peterson hop … and hop … and hop … and hop his way through the Minnesota Vikings’ new stadium, one couldn’t help but wonder: How badly might one of the NFL’s premier running backs be injured? And: Isn’t there a better way to get a hurt player to the locker room?

The answer to that first question could be clearer Monday, when Peterson is scheduled for an MRI exam on his right knee, which gave way at the end of a run in the third quarter of Minnesota’s 17-14 victory over Aaron Rodgers and the Green Bay Packers.

After the game Sunday night, Peterson was wearing a brace on his right leg and using crutches.

“He might miss a week,” Vikings coach Mike Zimmer said. “I don’t know if he will or not.”

Peterson was the 2012 league MVP and is a three-time league rushing leader. So given that the Vikings already lost starting quarterback Teddy Bridgewater for the season, losing Peterson for any significant amount of time could really undermine what Zimmer is developing on the defensive side of the ball.

It capped a rough day for running backs: Tampa Bay’s Doug Martin, Miami’s Arian Foster, San Diego’s Danny Woodhead, Carolina’s Jonathan Stewart and Detroit’s Ameer Abdullah all got injured.

In case you missed it, here are the other top topics after the NFL season’s second Sunday:

PATS NEED A SUB FOR THE SUB: Rookie QB Jacoby Brissett’s first NFL start could come this week, when he might be called upon to sub for the suspended Tom Brady’s sub, the injured Jimmy Garoppolo, in the New England Patriots’ game Thursday against the Houston Texans and old friend Bill O’Brien. Brissett, a third-round draft pick, played in New England’s 31-24 win against Miami on Sunday after Garoppolo’s right shoulder got hurt when he was slammed to the ground by linebacker Kiko Alonso.

SEAHAWKS’ STUMBLES: Tough to decide which is more troubling about Seattle’s 1-1 start — the zero turnovers created by its defense or the sole touchdown produced by Russell Wilson and the offense. A 9-3 loss to the punchless Los Angeles Rams is not a good look. Consider: The Rams have fewer touchdowns (zero) than victories (one). And yet No. 1 overall draft pick Jared Goff remains on the bench while Case Keenum plays QB for Jeff Fisher.

DAK’S DEAL: Used to be that as Tony Romo dealt with injury after injury, the Dallas Cowboys were destined to lose game after game. Maybe it’s different now. Dak Prescott became the team’s first rookie QB to win a start in 12 years when he led Dallas past the imploding Washington Redskins 27-23. Prescott completed 22 of 30 passes for 292 yards, he ran for a TD and, perhaps of most significance, he has yet to have a turnover in two games. “He’s very composed. He’s very confident in himself,” teammate Alfred Morris said. “He’s a natural leader, so I love that about him.”

0-2 AND LOOKING BAD: There are seven teams that are 0-2 — Chicago could join them with a loss against Philadelphia on Monday night — and several look as if there’s little hope of a turnaround. Jacksonville, Buffalo and Cleveland, for example. Most surprising club in that category? Maybe the Redskins, who not only have to be concerned about QB Kirk Cousins — only one TD pass and three interceptions so far, including an end-zone pick on third-and-goal at the 6 on Sunday — but also some internal finger-pointing, including defensive lineman Ricky Jean Francois wondering aloud about why the defense never makes adjustments.


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