Center is not the only undecided spot for the Vikings offensive line.
Three weeks before the regular season opener vs. the Saints, the Vikings are testing a couple offensive line combinations featuring guards other than Alex Boone and Joe Berger. During Monday's practice, Nick Easton and Pat Elflein rotated as the starting center. Another first-team look featured Easton at left guard, Elflein at center and Jeremiah Sirles at right guard.
Offensive coordinator Pat Shurmur was noncommittal when asked if Boone and Berger are locked in as the starting guards. Both have taken the lion's share of starting reps throughout the summer.
"We're going to have to see how that all plays out," Shurmur said. "We've got a couple more weeks. We're going to put the best five guys in there as far as we're concerned."
The spark for a potentially new approach appeared to be Friday night's preseason loss in Seattle, when a starting interior trio of Easton, Elflein and Berger played well, according to coaches.
"I thought it was a better performance, obviously, than [the preseason opener in Buffalo]," Shurmur said. "It was a different scenario. We got a bunch of twists. Those guys were in there playing pretty active. The protections were good. I thought early in the game we ran the ball well."
Even though Boone missed the exhibition because of an undisclosed injury (his left knee had been wrapped), he still might be hard to displace at left guard. Boone is the second-highest paid offensive lineman on the team with a $6.6 million base salary, $3.4 million of which is fully guaranteed.
So does that put Berger, the 35-year-old veteran on a bargain contract, into a competition at right guard? Coach Mike Zimmer said this spring the Vikings entered the summer undecided at center and right guard. But the latter spot has been controlled by Berger, who has taken nearly every snap there.