Iiro Pakarinen didn't put any weight on his left leg as he was helped off the ice in the first period of Saturday's game between the Edmonton Oilers and the St. Louis Blues.
Pakarinen crashed awkwardly into the end boards while attempting to hit Blues captain David Backes. He appeared to catch the toe of his left skate on the ice before colliding with the boards.
Pakarinen will not return to the contest due to a knee injury.
The 23-year-old rookie was recalled from the AHL at the beginning of February after recording one goal in five November contests in his first NHL stint.