Sabourin is a 31-year old journeyman, with stops in Calgary, Pittsburgh and Vancouver during his career. He played 37 games in Hersey this season, with a 2.76 GAA and a .909 save percentage.
The Capitals start their postseason series against Boston on Thursday, and are dealing with a pair of injured goalies atop their depth chart. Both Tomas Vokoun and Michal Neuvirth have injury issues, a groin and a leg injury, respectively. Neither were at practice on Monday, according to the Washington Post.
Braden Holtby, who made seven appearances this season, would be to goalie with Vokoun and Neuvirth sidelined. Sabourin would be his backup netminder.