Leighton out with severe ankle sprain
Leighton suffered the injury during a 4-3 shootout loss to Nashville on Tuesday. Brian Boucher, who replaced Leighton at 9:45 of the first period, will be the Flyers' starter while Leighton is out. Rookie backup Jeremy Duchesne was called up from Adirondack of the AHL on Wednesday.
An MRI on Thursday revealed the extent of the injury, which will sideline Leighton for the rest of the regular season and at least the opening round of the playoffs.
Leighton stepped in and earned the starting role after Ray Emery was lost for the season due to hip surgery.
The Flyers claimed Leighton off waivers from the Carolina Hurricanes on Dec. 15. He is 16-5-2 with a 2.48 GAA and .918 save percentage since joining the Flyers.
ESPN.com's Scott Burnside and The Associated Press contributed to this report.