Lyon suffered the injury pre-game of the Flyers-Islanders preseason match at Barclays Center on Sept. 18. So far at camp, he appeared in just 30 minutes of ice time, stopping nine of 10 shots, in the club's loss to the Islanders at Nassau Coliseum on Sept. 16.

During the team's complete day off at Training Camp, Flyers GM Ron Hextall announced that goaltender Alex Lyon will be out approximately four weeks with a lower-body injury.

The Flyers signed Lyon to a two-year contract extension on July 7, 2018 after making his NHL debut with the club in 2017-18.

He made his NHL debut on Jan. 31 at Washington in a relief effort where he stopped all five shots he faced in 8:02 of playing time. He earned his first win in the NHL on Feb. 18 at Madison Square Garden in New York where he appeared in relief of an injured Michal Neuvirth and stopped 25 of 26 shots in the second and third period from the Rangers.

Overall, he made 11 appearances last season, including seven starts, where he posted a 4-2-1 mark to go along with a 2.75 goals-against average and .905 save percentage.

Lyon also went 16-8-2 with a 2.77 GAA and .911 save percentage in the regular season with the club's American Hockey League affiliate, the Lehigh Valley Phantoms this past season and was their starter in the 2018 Calder Cup playoffs, where he went 6-5 and posted a 1.98 GAA and .944 save percentage leading Lehigh Valley to the Eastern Conference Finals.