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.