At the conclusion of his third season in the KHL in which he was a selection to the 2015 KHL All-Star Game, Mironov was swiftly signed to a two-year contract extension with Dynamo Moscow on 22 April 2015. After he was passed over in the three preceding drafts, Mironov was selected 101st overall by the Colorado Avalanche, marking their first Russian selection since 2004, in the 2015 NHL Entry Draft on 27 June 2015.