This looks like Stolarz’ minor injury was a blessing in disguise if the additional scans discovered a hidden issue.
The Athletic: Leafs goalie Anthony Stolarz out 4-6 weeks with knee injury
Explaining the injury in detail, Treliving said that Stolarz had something that looked like a “little pebble” stuck in behind his knee, which was hindering his ability to straighten his leg. The upcoming procedure will remove that “pebble.”
“It’s in the wrong spot,” Treliving said. “We waited for a few days to see if it would move. But it doesn’t allow him to get full range of motion, so it’s gotta be removed.”
Left in there, it can damage the joint. So it is good to get it out regardless
It is a significant blessing he wasn't more seriously hurt.
He has plenty of time to heal up and get back into game shape before the playoffs.
With Murray back from his brief injury, along with Hildeby & Akhtyamov, they should be fine - each team has 2 healthy goalies.