Vikings OL coach Tony Sparano dies unexpectedly

Minnesota Vikings offensive line coach Tony Sparano died unexpectedly early Sunday morning at the age of 56, the team said.

"Our hearts go out to Jeanette and the entire Sparano family as we all mourn the loss of Tony," owners Mark and Zygi Wilf stated. "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 served on the Vikings' staff for the last two seasons, and was expected to be with the team at the beginning of training camp on Tuesday for his third year.

The veteran assistant was known by NFL fans primarily for the four years he spent as head coach of the Miami Dolphins between 2008 and 2011. He led the Dolphins to an AFC East title in his first campaign, popularizing the Wildcat formation along the way.

Sparano, who was hired by Miami on the recommendation of legendary coach Bill Parcells, amassed a 29-32 record until his firing.

Over his 19 years coaching in the NFL, Sparano spent time with the Cleveland Browns, Washington Redskins, Jacksonville Jaguars, Dallas Cowboys, Dolphins, New York Jets, Oakland Raiders, San Francisco 49ers, and Vikings.

In 2014, the Raiders went 3-9 with Sparano as their interim head coach.