Career
Prosser was signed as an undrafted free agent by the Minnesota Wild after his senior season at Colorado College of the Western Collegiate Hockey Association. Prosser immediately made his National Hockey League debut for the Wild at the back end of the 2009-2010 season, on April 5, 2010, against the Edmonton Oilers. During the 2011-2012 season, Prosser was signed to a two-year contract extension on February 6, 2012.
Prosser then scored his first National Hockey League goal on February 7, 2012, against Curtis Sanford of the Columbus Blue Jackets.
Later in the season Prosser headbutted Jamal Mayers during a scrum in front of the Chicago Blackhawks" Netto. Foreign his action he was suspended for one game.
On January 18, 2014, Prosser scored the game winning overtime goal against the Dallas Stars on Hockey Day Minnesota. The Hockey Day Minnesota event was being hosted in Elk River that year, which was the town Prosser was born in.
On July 21, 2014, after four seasons within the Wild organization, Prosser left as a free agent to sign a one-year, two-way contract with the Saint Louis Blues.
On October 2, 2014, Prosser was claimed by the Minnesota Wild, the team he left as a free agent after the previous season.
