Education
University of Wyoming.
University of Wyoming.
He played college football at the University of Wyoming. Prosinski was a senior captain at the University of Wyoming. He was voted Second Team All-Mountain West Conference at the conclusion of the 2009 and 2010 seasons.
Jacksonville Jaguars
The Jacksonville Jaguars selected Prosinski with a fourth round pick in the 2011 NFL Draft.
Prosinski was waived/injured on September 23, 2014. Philadelphia Eagles
Prosinski was signed by the Philadelphia Eagles on November 3, 2014.
He took the roster spot of DeMeco Ryans, who had suffered a season-ending injury one day earlier. Chicago Bears
Prosinski was signed by the Chicago Bears on September 29, 2015.
Prosinski recorded his first career sack against the Denver Broncos on November 22, 2015.
On March 25, 2016, Prosinski signed a 1-year contract with the Chicago Bears worth $745,000. He attended Buffalo High School in Buffalo, Wyoming. On June 27, 2015, Prosinski married with Mission Wyoming of 2012, Lexie Madden.