+/- is a ****** stat but in Karlsson's case at least half of them are deserved. Really not a good start for him this year but he has shown glimpse of good play here and there. Wouldn't bet on him getting in the +es anytime soon though, takes way too many dumb decision.
Exemple, versus Boston yesterday game was tied 1-1 and he has time to swing back behind the net, tries a risky pass right in the slot. No need to do that, you go center ice when you're sure your pass is okay cause if not 90% of the time it ends back in the net. Then after that we're down by 1 and he goes for a stupid pinch while everyone is down low in the zone. One of the important rule on a pinch is you have to make sure someone is covering you or that you will get the puck, 0/2 there. Then his other two -es last night weren't really his fault.
He can be much much better and I am confident he will. Seems like a competitive person and he must be frustrated IMO