April, 2017 - Stolarz knee injury in Phantoms game, surgery. While it was originally reported as a right knee MCL, Meltzer and Panaccio later report that it was a left knee meniscus injury.
September, 2017 - Re-injures left knee, has meniscus repair surgery. Season lost.
December, 2018 - With Stolarz starting due to raft of goalie injuries, a certain coach looking to save his job overuses him. He suffers a "lower body" injury in the first period of the game in Vancouver. is seen flexing his left knee before coming off. The Flyers end the game with a goalie tandem of Alex Lyon and emergency goalie, Rylan Toth, on the bench. The Hart era begins the next game against Detroit.
Looking at the Flyers goalie injury woes this season, I can see why Fletch would want to try to avoid it happening again. With Stoli's injury history, I can also see why Fletch would be reluctant to bet on his health going forward.