Having been drafted by the Edmonton Oilers in the second round, 46th overall, at the 2010 NHL Entry Draft, on 25 April 2011, the Oilers signed Marinčin to a three-year, entry-level contract. During the 2013–14 season, Marinčin was called up to the Oilers, and on 5 December 2013, he made his NHL debut in a game against the Colorado Avalanche.