John Sullivan has signed a contract extension with the Minnesota Vikings through the 2017 season.

Sullivan is the Vikings' center.

"I want to start by saying thank you to the Minnesota Vikings for putting their faith in me as a person and football player," Sullivan said. "The Vikings have been with me through professional highs and lows, and have stood by my side and supported me through personal hardships. My ability to express the true depth of my gratitude comes from my actions on and off the field."