Stewart, 26, will enter his sixth NHL season in the fall.
"I don't think it's going to take that long to turn it around here. Obviously you're subject to all those trade rumors and all the stuff like that, but that's out of my control," Stewart told the Sabres website on Thursday. "Like I've said before, as long as I'm a Buffalo Sabre, I'm just going to worry about helping this team win hockey games and that's all that's on my mind."
Sabres GM Tim Murray is expected to be very active this off-season, as a number of changes are on the horizon.
The Sabres are expected to buy out forward Ville Leino's contract, be active in the trade market and attempt to lure several free agents to town.
If Stewart isn't dealt, he knows what he needs to do to help contribute to the team's success in 2014-15.
"It's about getting healthy now and having a good offseason and coming back strong next year," he said. "It sucks. You go from the Olympic break to your year being over. You obviously want to play this game. I tried to push it to come back and I was feeling good for a couple weeks. It sucks that I ended the way on the way it did, but that's in the past now and all we can do now is worry about the future."