Thanks to the reader who let me know artist info.
Artist: Sylvie Marsolais of Sylabrush
He has only played one game (October 10, 2015) this season. He was sent to the AHL in November, and is now on injured reserve. (12/21/15) Below is his Los Angeles Kings gear. On the Sylabrush website there are photos of a new Islanders mask, but there are no photos of him wearing it.
Update: Berube is back and has played in a couple of games in February. He's now wearing all Islanders-themed gears.