Casey Mittelstadt and Zemgus Girgensons will return to the lineup when the Sabres visit the Ottawa Senators on Tuesday (7 p.m. ET; TSN5, RDS, MSG-B, ESPN+, NHL LIVE).
Mittelstadt has missed 15 games following surgery for an upper-body injury. The forward previously missed 21 games this season after sustaining an upper-body injury Oct. 14. He has scored one goal in four games.
"He kind of exemplifies our team," coach Don Granato said. "We need to see everybody taking the next step now because I mentioned when you don't have the depth, you have (Tage) Thompson always playing against the top D every game. Now you add Mittelstadt in there, Mittelstadt, (Dylan) Cozens, Thompson in there, it's going to make room for everybody to cash in more, and we need to see that. We need to push for that."
Girgensons has missed five games with a lower-body injury. The forward has scored 12 points (seven goals, five assists) in 33 games.
Alex Tuch, who has scored 10 points (three goals, seven assists) in nine games with the Sabres, had a maintenance day Monday and did not practice but is expected to be in the lineup against the Senators.
Kyle Okposo returned to practice Monday wearing a no-contact jersey after missing two games with an upper-body injury. The forward will not play Tuesday but could return later in the week.
"He looked good in practice and is feeling better every day," Granato said. "I would expect him within that next game or two, so he's close."
Defenseman Will Butcher, who missed a 6-3 win Saturday against the Philadelphia Flyers with an upper-body injury, practiced and could be on the cusp of returning.
"Didn't know a couple of days ago how he'd feel day to day with that injury because it's a pain tolerance," Granato said. "Obviously him being on the ice today, looked like he moved fine, which is good news. I'll find out more on him but he's I would say very close as well, if not ready to go." -- Heather Engel