If anything Lou does way too much stupid tinkering and doesn't just let the players play enough. Yes, there are days where you're not gonna get the big hits. Those are the days you lose. There will be at least around 60 of those even if you're really good. You can't force things to happen.
But yea, him having a strain is never a good thing. Then again, they may not have found anything structurally but just want to put a label on whatever it is that caused him that pain.