Clarke MacArthur (upper body) was placed on injured reserve Thursday.

MacArthur (upper body) was placed on injured reserve Thursday.

Analysis:

MacArthur collided with teammate Robin Lehner in Monday's loss to the Hurricanes, resulting in injuries and now IR stints for both players. While MacArthur will be eligible to return to action as soon as the Senators' Feb. 25 game against the Ducks, but there's no evidence yet that he'll be ready by that time. He has yet to resume skating since suffering the injury.