At least one roster change is inevitable: a goalie swap for both teams, having played back-to-back (which you knew already). If Cassidy plays Halak in a fourth straight game and in both of these games in Pittsburgh... fire him into the sun, please.
Forwards
Brad Marchand - Patrice Bergeron - David Pastrnak
Jake DeBrusk - David Krejci - Craig Smith
Nick Ritchie - Charlie Coyle - Anders Bjork
Trent Frederic - Sean Kuraly - Karson Kuhlman
Defense
Matt Grzelcyk - Charlie McAvoy
Jakub Zboril - Connor Clifton
Jarred Tinordi - Steven Kampfer
Goalies
Dan Vladar
Jaroslav Halak
Forwards
Jake Guentzel - Sidney Crosby - Bryan Rust
Evan Rodrigues - Evgeni Malkin - Kasperi Kapanen
Zach Aston-Reese - Teddy Blueger - Brandon Tanev
Colton Sceviour - Mark Jankowski - Anthony Angello
Defense
Brian Dumoulin - Kris Letang
Michael Matheson - Cody Ceci
Marcus Pettersson - Chad Ruhwedel
Goalies
Casey DeSmith
Tristan Jarry