It needs to heal before he can do anything, he hasn't even been running yet and hitting off a tee with light throwing. It's more serious than a pain factor, it's about strength and stability. He needs to get cleared first, when that is who knows, hopefully we hear something good by the DS, but it's not about pain, it's about what damage he can do to the rest of his knee, the PCL is the the strongest ligament in the knee, if that has a tear, it leaves the ACL and MCL open to injury.