Hafner was on board for both of Colorado's ECHL Kelly Cup championships the last two seasons. In 2016-17 the Toledo, Ohio native began the season with Columbus in the Southern Professional Hockey League, appearing in six games before joining the Alaska Aces for five ECHL games. Hafner headed to Colorado in February of 2017 and logged five regular-season games before leading the Eagles to the league crown with a 2.43 goals-against average and .903 save percentage while earning an ECHL-best 14 wins in the Kelly Cup Playoffs. Last year, Hafner helped the Eagles to their second ECHL championship appearing in 20 regular-season games, posting a 13-4-1 record.
The 26-year-old completed three years of juniors in 2011-12 appearing in 48 games with Cornwall in the CCHL, leading the league with a 2.11 goals-against average and a .929 save percentage on his way to earning a spot on the CCHL Second All-Star Team. In 2015-16, Hafner finished a four-year collegiate career with Western Michigan University, highlighted by a sophomore season going 9-6-2 with a 2.06 goals-against average, .925 save percentage and two shutouts in 21 NCHC games.
Miller, 23, will be making his pro debut with the Komets. The Stony Plain, Alberta native completed four seasons at Ohio State last year amassing Big 10 collegiate career totals of 40 points (24g-16a) in 114 games. Last season, Miller scored 12 points (8g-4a) in 38 games while ranking 12th in the Big 10 with +13 rating. The center registered a career-year in 2016-17 scoring 11 goals and 15 points in 38 games and was named co-recipient of the team's Most Improved Player award. Miller finished his college career as a four-time Ohio State Scholar-Athlete and a three-time Academic All Big Ten honoree.