Ristolainen missed the Flyers' previous game due to an upper-body injury and will be a game-time decision Tuesday as the Flyers take on Pittsburgh. The 28-year-old has three goals, 15 assists, 70 SOG, 28 PIMs and a -3 plus/minus through 68 games before his injury.

Ersson allowed three goals on 30 shots (.900 SV%) for his second-straight loss as he was defeated by the Pittsburgh Penguins in his previous start. The 23-year-old has been decent in his small showing so far this season, with his 6-2-0 record, .899 SV% and 3.07 GAA. He will take on the St. Louis Blues, who have lost their last two games and are 15th in the NHL in goals per game (3.22).

Ersson was 6-1-0 with a .898 SV% and 3.07 GAA and has been loaned back to Lehigh-Valley (AHL) Friday as Carter Hart (lower-body) is expected to rejoin to the team. The 23-year-old returns to the minors, where he is 21-14-1 with a .904 SV% and 2.70 GAA.

Ersson had a 21-14-1 record, .904 SV% and 2.70 GAA with the Lehigh Valley Phantoms (AHL) but has been recalled to Philadelphia Tuesday on an emergency basis due to an injury to Carter Hart (lower-body). The 23-year-old returns to the Flyers, where he is 6-1-0 with a .898 SV% and 3.07 GAA.

Deslaurier has missed the Flyers' previous two games due to an upper-body injury but is expected to return to the Flyers' lineup Tuesday vs. Montreal. The 32-year-old bruiser has five goals, six assists, 62 SOG, 111 PIMs and a -9 plus/minus through 70 games this season.