Erskien (upper body) was placed on injured reserve Wednesday, Alex Prewitt of the Washington Post reports. The Capitals ruled Erskine out of the entirety of their three-game road trip to Western Canada earlier this week, so the IR move will allow the team to add another defenseman from the minors for depth purposes. Erskine had been a healthy scratch for the Capitals in every game even before succumbing to the injury.