2008-09: Prosser skated in all 38 games for Colorado College as a junior. Prosser's five goals were most amongst Tigers' defensemen and he was an even plus/minus with 8 assists and 61 PMs. Three of his five goals were scored on the power play. The Tigers tied Wisconsin for third place in the WCHA but were denied an NCAA tournament bid after being swept by Minnesota-Duluth in the WCHA first round.
2009-10: Prosser signed an entry-level deal with the Minnesota Wild in March 2010 and made his NHL debut after finishing his senior season with Colorado College. In three games with the Wild, Prosser was +2 and posted 1 assist with 8 penalty minutes. Prosser skated in 39 games for Colorado College and was named to the WCHA's Second All-Star Team after finishing +8 with 4 goals and 24 assists in 39 games.
2010-11: Prosser appeared in two March games for the Wild; spending most of his first pro season with Minnesota's AHL affiliate Houston. He averaged just under 15 minutes of ice time and was an even plus/minus with no points or penalties in two NHL games. With Houston, he was usually paired with high-scoring Maxim Noreau on the Aeros' top unit. He scored 8 goals with 19 assists and was +12 with 31 PMs in 73 games during the season and skated in all 24 games during Houston's run to the Calder Cup Finals. He scored 2 goals with 2 assists and was +2 with 16 PMs in the playoffs.
2011-12: Prosser appeared in 51 games for the Wild in his second pro season – spending part of the year with Minnesota AHL affiliate Houston. He scored his first NHL goal and had 11 assists; finishing minus-17 with 57 penalty minutes. He played 23 games for the Aeros and was plus-nine with 4 assists and 10 penalty minutes. Houston finished fourth in the West Division; falling to Oklahoma City in four games in a best-of-five first round playoff series. Prosser skated in two AHL playoff games; scoring 1 goal and finishing plus-one with 2 penalty minutes. Prosser signed a two-year contract extension with the Wild in February 2012.
A decent skater whose offense hasn't been noticeable at the NHL level. Prosser has been treading water as a fill-in on a depleted Wild blueline this season, but could work as a bottom-pairing defenseman.
Could be a good depth defender for the Wild for the next two seasons.