The Cs will need to be very cautious with this injury. Knee bruises and MCL strains are minor in and off themselves, but put them on a player coming back from a MCL/ACL tear on the other knee and it opens up that player to all kinds of overcompensation injuries, the exact kind of injuries that often derail otherwise successful comeback attempts. I'd sit down Perk until he was pain-free and 100% healthy.
The Cs have been pretty flippant in the way they brought back Perk and ignored his minutes limitations from almost Day 1. That said, this injury occurred because Curry kneed him in the knee, so I don't think it's related to his overuse. Of course, going forward they need to extra-cautious about overusing Perk, especially in the regular season.