Petry suffered a lower-body injury against the Panthers on Thursday and is expected to miss an extended period of time. The injury comes at a tough time for Petry, who has been playing his best hockey of the season lately. He has 10 points (3G / 7A) in his last 17 games.
Tarasenko missed the last two games with an illness but will play Thursday vs. the Flyers. With the second line playing well in his absence, he'll start on the "third" line with Robert Thomas and Ivan Barbashev.
Copp was acquired from the Jets on Monday and will start on a line with Filip Chytil and Dryden Hunt. Copp has scored 13 goals with 22 assists (35 points) in 56 games this season.
Motte was acquired from the Canucks on Monday and will start on the Rangers' fourth line with Barclay Goodrow and Ryan Reaves. Motte is a tenacious penalty killer and has tallied 15 points (7G / 8A) in 49 games this season.
Tarasenko will miss his second straight game with an illness but could join the team in Buffalo for Friday's game. The Blues will also be without Robert Thomas (upper-body), so the Blues may need to go with 11 forwards and seven defensemen.
Tarasenko will miss Saturday's game in Columbus due to an illness. Robert Thomas is expected to return from an illness of his own to replace Tarasenko in the lineup.