Well, I said longer than that for full recovery if you wanna get technical.
Edit:
“It's coming along well. It's a couple more weeks until I can get out of the splint and start really rehabbing and build my strength back," Matthews said, per NHL.com. "I'm going to get back on the ice this week. I'm really hopeful to be ready to go in Game 1."
Seriously, that's September 27 to *start* rehabbing the wrist and he's only starting to skate this week. I'll bet you a $100,000 SB cash (whatever that is) that he won't be playing game 1 and won't be himself until somewhere around Christmas.