Flyers defenseman Andrew MacDonald might have suffered a concussion when he was slammed into the boards Sunday in a 6-2 loss in Pittsburgh. He will not be able to play Wednesday in a key game in Detroit, general manager Ron Hextall announced Monday.
Hextall would only call it an upper-body injury.
Evgeny Medvedev, a healthy scratch for the last 11 games, will replace MacDonald, who leads Flyers defenseman with a plus-8 rating and has played well since replacing the injured Michael Del Zotto.
Medvedev will likely be paired with MacDonald's defensive partner, Shayne Gostisbehere.
Midway through the third period Sunday, MacDonald, 29, was off balance when Tom Kuhnhackl knocked him into the boards headfirst.