Senators goalie Craig Anderson suffered an ankle injury in the third period of Thursday's 3-2 shootout win over the New York Rangers. Ben Bishop relieved and stopped six of seven attempts in the shootout to earn the victory. Anderson's injury isn't considered to be severe, and he's listed as day-to-day.
The 21-year-old Lehner has appeared in 13 NHL games for the Senators over the previous two seasons, posting a 4-6-0 record with a 2.81 goals-against average and .910 save percentage.
The Senators also assigned forward Stephane Da Costa to Binghamton. Da Costa had one goal and one assist in nine games for Ottawa this season.