Career
He was signed by the Houston Texans as an undrafted free agent in 2010. He played college football at Wyoming. Denver Broncos
In a game against the Tampa Bay Buccaneers on December 2, 2012, Unrein lined up for the first time as a fullback.
He then proceeded to catch a touchdown pass from Peyton Manning.
On April 11, 2013, Unrein signed a one-year, $630,000 tender. The Broncos placed a one-year $1.431 million tender on Unrein on March 7, 2014.
San Diego Chargers
Unrein signed with the San Diego Chargers on March 19, 2015. On September 24, 2015, the San Diego Chargers reinforced the tight end position, bringing back Kyle Miller nine days after he was waived on September
15. To make room, the team released Delaware Mitch Unrein.
Chicago Bears
Unrein was signed by the Chicago Bears on September 25, 2015. On November 9, 2015, Unrein lined up at fullback against the San Diego Chargers. This was the first of many times he was used like this by the Bears.
On March 12, 2016, Unrein was re-signed by the Chicago Bears to a two-year contract.
Unrein is married to Olympic bronze-medalist trapshooter Corey Cogdell. He has five siblings.
He is also distant cousins with former NFL defensive end Terry Unrein, who was selected in the third round of the 1986 NFL Draft by the San Diego Chargers.