The Vikings appear to have settled on Joe Berger as their starting center, making John Sullivan, one of the team's longest-tenured players, expendable.
A day after Sullivan did not play in a 23-10 preseason win over the San Diego Chargers, the Vikings attempted to trade Sullivan, an NFL source confirmed.
They were unable to complete a deal on Monday night, and if they can't by Tuesday's 3 p.m. deadline for teams to cut their rosters down to 75 players, the Vikings could release Sullivan, who has been with the team since 2008.
That means that Berger, who was the only center to snap the ball to starting quarterback Teddy Bridgewater during Sunday's win, likely will be the Week 1 starter with second-year center Nick Easton behind him on the depth chart.