Looking at the X-Factors for the Penguins-Islanders series

At this point we already know who the main players are going to be in the Pittsburgh Penguins-New York Islanders First Round series. For Pittsburgh it is Sidney Crosby, Evgeni Malkin, Jake Guentzel, and Kris Letang. For New York it is Mathew Barzal, Semyon Varlamov, and players like Jordan Eberle and Brock Nelson.