Tony Sparano, the Minnesota Vikings' offensive line coach, has died at the age of 56.
The Vikings confirmed on Sunday that Sparano died "unexpectedly" Sunday morning.
"With deep regret the Minnesota Vikings announce that Offensive Line Coach Tony Sparano unexpectedly passed away early this morning," owners Mark and Zygi Wilf said.
“Our hearts go out to Jeanette and the entire Sparano family as we all mourn the loss of Tony. Tony was a passionate and driven individual who cared deeply about his family, and especially enjoyed spending time with his grandchildren.
"Tony's presence within the Vikings organization will be deeply missed. We are only thinking of Tony’s family during this incredibly difficult time. We ask that the entire NFL and Vikings family keep the Sparanos in their thoughts."
Sparano joined the Vikings in 2016 as the O-line coach, having previously worked alongside head coach Mike Zimmer when the two were at the Dallas Cowboys.
He is also a former head coach of the Miami Dolphins and interim head coach of the Oakland Raiders.