2008-09: Karl Stollery skated in 35 games for Merrimack College as a freshman. He scored 5 goals with 11 assists and was -1 with 28 penalty minutes. Merrimack slipped to ninth place in Hockey East but played some of its best hockey late in the year – finishing 4-4-1 in its last nine games. Stollery was named to Hockey East's All-Rookie team.
2009-10: Stollery played in 35 games in his sophomore season at Merrimack. He was the Warrior's fourth leading scorer and topped Merrimack defensemen with 4 goals and 15 assists and was -2 with 42 penalty minutes. Merrimack finished sixth in Hockey East and took third place Boston University to a decisive third game in the Hockey East quarterfinals.
2010-11: Stollery was the leading scorer amongst Merrimack defensemen for the second straight year in the Warriors' most successful season since joining Hockey East in 1989-90. The junior was an assistant captain and scored 6 goals with 21 assists in 39 games; finishing +11 with 48 penalty minutes. Merrimack finished fourth in Hockey East and earned an at-large bid to the NCAA tournament after reaching the Hockey East championship game. The Warriors lost 4-3 in overtime to Notre Dame in the NCAA Northeast semifinals to finish 25-10-4.
2011-12: Stollery made his pro hockey debut with the AHL's Lake Erie Monsters in March following his senior season at Merrimack. In nine games he scored 2 goals with 5 assists and was an even plus/minus with 4 penalty minutes. The Monsters finished third in the North Division, one point behind Rochester and Houston for the final Western Conference playoff spot. Stollery was a team captain in his final college season and led Merrimack defensemen with 21 points. He scored 7 goals with 14 assists in 37 games and was +13 with 58 penalty minutes. The Warriors, finished fifth in Hockey East, posting back-to-back winning seasons for the first time since joining the conference, but did not receive an NCAA bid after falling to Maine in a three-game Hockey East quarterfinal series.
2012-13: Stollery played in 72 games for Colorado AHL affiliate Lake Erie in his first pro season, most amongst Monsters' defensemen. He scored 5 goals with 29 assists to lead Lake Erie defensemen in points and was +11 with 62 penalty minutes. The Monsters finished third in the North Division but missed the Western Conference playoffs. Stollery signed a one-year free agent contract with Colorado in May, 2013.
Stollery is a late bloomer who is just coming into his own after four years of NCAA hockey. He plays a solid defensive game with few mistakes and can produce in the offensive end as well.
Stollery will be important for the development of Avalanche defensive prospects, as he will be looked to as a leader for a relatively young blue line. In his first full year of play for the Monsters he led all defenseman in points.