Sami Aittokallio, Kieran Millan and Kent Patterson inked deal Friday.
The 19-year-old Aittokallio is a native of Finland. He was a fourth-round pick of the Avalanche in the 2010 draft.
Millan just completed a four-year career at Boston University, where he is the career leader in victories, games played and saves. He was a fifth-round draft pick in 2009 for Colorado.
Patterson played for the University of Minnesota, which earned a berth in the 2012 NCAA Frozen Four. Colorado chose him in the fourth round of the 2007 draft.
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