But still, it's hard to know just how far he's come until being put in an actual game scenario.
That will come tonight.
"Unfortunately, this is a sport where it's very, very tough to duplicate game scenarios without playing in a game," Stamkos said. "So, tonight will be a good start. Again, it's not regular season. It's a little different, but I'm hoping to use these preseason games just like everyone else in this room, to get prepared and to get ready and get the timing back.
"So, that's why I'm anxious for tonight."
Stamkos isn't the only one inside the Lightning locker room anxious for the return of the team captain.
"I think everybody is and probably himself too, just being out for so long," Tampa Bay assistant coach Todd Ricahrds said. "Probably a little bit of nerves (for him) getting back into it, getting used to the timing and the speed. Ryan Callahan's in the same boat that he is. So, we'll get a chance to get both of those guys in the lineup tonight and, again, through camp here, as you start to get more NHL players in, the intensity, the speed starts to get amped up, and then when you get hit game one, it's another level. Getting those guys in the lineup is important for our group, and not just on the ice, but the importance of having those guys in the room, I think that's something we missed last year."
Stamkos said the main thing for him tonight is to get back to a place where he's reacting naturally to the play and not thinking about his body.
"When you get injuries, the tendency is the mind telling the body to protect that certain area that's injured," he said. "It's a natural reaction to an injury. Usually when you're over it is when you're not thinking about it, you're just going out there responding to the play, you're letting the game come to you. That's what I'm hoping for tonight. It's felt pretty good in the scrimmages and the battle drills, things like that. It hasn't been an issue. Again, we'll find out more tonight, and we'll let you know after the game."