via Frank Seravalli of the Philadelphia Daily News,

A routine Flyers practice trickled to a halt on Friday afternoon when goaltender Steve Mason went down with an apparently significant injury.

About 30 minutes after the team entered the ice, the net was immediately moved out the way as concerned teammates and coaches huddled around Mason.

It was not apparent what caused the injury or exactly what was ailing Mason.

He originally laid flat on his back in the crease. Eventually, he sat up with the help of trainer Jim McCrossin, before being helped off the ice.

Craib Berube was just on TSN Radio and said no idea what happened nor what the problem is at this point.

added 5:09pm,

Flyers GM Ron Hextall updated the media following the team’s flight to Toronto on the status of goaltender Steve Mason, who left practice with an injury.

“Steve Mason has an upper-body injury and is out for the weekend. We will have an update on Monday.”

The Flyers play back-to-back games over the weekend, taking on the Toronto Maple Leafs at the Air Canada Centre on Saturday before traveling to Winnipeg to take on the Jets on Sunday night.

Mason stopped 31 of 32 shots and four of six players in the shootout to take a 2-1 loss in the Flyers-Panthers game on Thursday.

He has started three straight and 11 of the Flyers’ last 13 games while posting an overall record of 6-10-5 to go along with a 2.49 goals-against average and .921 save percentage in 22 appearances this year.