2006-07: Dunn was 19-4-2 with 2 shutouts in 27 Games for the Wellington Dukes of the OPJHL with a 1.83 GAA and .939 save percentage. He committed to playing college hockey at St. Cloud State.
2007-08: Dunn saw action in nine games as a freshman at St. Cloud State (WCHA) as a back-up to Islanders’ prospect Jase Weslosky. He finished 3-2-2 with a 2.63 GAA and .910 save percentage for a Huskies team that finished tied for fourth in the WCHA. Dunn won his first college game on October 27 when he stopped 35 shots in a 6-1 win over Bemidji State. Dunn did not see any action in the post-season as the Huskies swept Wisconsin in the WCHA First Round before falling to Minnesota, 3-2, in the WCHA Final Five quarterfinal game. St. Cloud State received an at-large bid to the NCAA tournament and lost to Clarkson, 2-1.
2008-09: Dunn again backed up Weslosky in his second season at St. Cloud State. He was 2-4-1 with a 2.60 GAA and .904 save percentage in nine games for the Huskies; who slid to sixth in the WCHA standings. Both of Dunn’s wins came early in the season against non-conference opponents Mercyhurst and Robert Morris. Dunn did not have any starts against WCHA opponents in conference play and two of his four losses were in games that Weslosky started.
2009-10: With Mike Lee, the 2009-10 Goaltender of the Year in the USHL slated to begin his college career, it appeared that Dunn might slip to third behind Weslosky and Lee on the Huskies goaltending depth chart. That all changed when Weslosky transferred to Bemidji State due to academic issues. Dunn, after opening the season with a 3-2 loss to Frozen Four-bound Miami in the first game of the season, went 11-1-1 in his next thirteen starts playing in tandem with Lee. That stretch included a 47-save effort on November 14 in a 3-2 win at North Dakota and a 3-2 win at first-place Denver on November 28. Dunn was especially busy over the holidays while Lee was with Team USA at the WJC U-20 tournament. St. Cloud State, after finishing third in the regular season, defeated Minnesota State in a tough best-of-three series in the WCHA semifinals; with two of the three games decided in overtime. Dunn started the first game of the series but suffered the loss when Kael Mouillierat scored just 20 seconds into overtime. Lee then started the next two games as well as posting a 2-0 shutout win over Wisconsin in the semifinals the following week. In the WCHA championship game against North Dakota, Dunn relieved Lee after Chris VandeVelde gave North Dakota a 4-2 lead midway through the second period. He stopped all 11 shots he faced to keep the Huskies in the game before the Fighting Sioux added an empty net goal with 41 seconds left for a 5-3 win. Lee started both games in the NCAA West regional as St. Cloud State beat Northern Michigan 4-3 in two overtimes before falling to Wisconsin, 5-3. Dunn relieved Lee late in the first period against Wisconsin and allowed one goal in 32 shots in a 5-3 season-ending loss. For the year, Dunn was 12-5-2 with a 2.58 GAA and .915 save percentage and was selected Third Team All-WCHA.
Dunn is a big goaltender who fills the net with his size and relies on quick reflexes. A defenseman during much of his youth hockey career before switching to goalie full-time when he was 14, he relies on a hybrid style rather than being a true butterfly goalie. Dunn is still fairly inexperienced as he played just a handful of games in his first two years of college hockey. Dunn has shown some resiliency waiting for his opportunity and has performed when given the opportunity.
Signed a pro contract with the Rio Grande Valley Killer Bees of the Central Hockey League. Not offered a contract by Washington.