Ennis has played in 700 career NHL games with the Sabres, Oilers, Maple Leafs, Wild, and Senators. He scored 20 goals in the 2013-14 season, 2010-11 season, and the 2014-15 season, all of which came with the Sabres.
He was looking to make an NHL return but was unable to earn a PTO so he had to look back overseas to continue his career.