Fitzgerald is considered day-to-day due to a lower-body injury.
Wilson is considered day-to-day with a lower-body injury.
Montour will miss the rest of Buffalo's preseason schedule due to a hand injury.
Pekar was assigned to his junior club OHL Barrie on Wednesday.
Wilson left Tuesday's preseason game versus the Blue Jackets with an undisclosed injury and won't return, Paul Hamilton of WGR Sports Radio 550 reports.
Ullmark will get the start in net in Tuesday's exhibition game against Columbus, Paul Hamilton of WGR Sports Radio 550 reports.
Sobotka (upper body) will be in the lineup for Tuesday's preseason matchup with Columbus, WGR Sports Radio 550 reports.
Cozens (thumb) is expected to play in Monday's preseason opener against Pittsburgh, Mike Harrington of The Buffalo News reports.
Scandella (lower body) will play in Monday's preseason clash with Pittsburgh, Paul Hamilton of WGR Sports Radio 550 reports.
Hutton will start Monday's home preseason game versus the Penguins, Paul Hamilton of WGR Sports Radio 550 reports.
Montour has fully recovered from his MCL injury, John Vogl of The Athletic reports.
Bogosian (hip) will miss the entirety of Buffalo's training camp.
Luukkonen (hip) will miss the first month of the season, according to general manager Jason Botterill.
Pilut (shoulder) is expected to return to the ice in mid-October.
Johansson (undisclosed) will be in the lineup for Monday's exhibition game against the Penguins, Joe Yerdon of the The Athletic Buffalo reports.
Pekar (shoulder) will be in the lineup for Monday's exhibition match against Pittsburgh, Joe Yerdon of The Athletic Buffalo reports.
Although Luukkonen (hip surgery) will not take part in the team's first training camp practices next week, he remains "on track" in his recovery, assistant general manager Randy Sexton told The Buffalo News.
Cozens (thumb) has been cleared to play in Friday night's "Prospects Challenge" game, Bill Hoppe of the Olean Times Herald reports.
Cozens (thumb) will participate in Thursday's "Prospects Challenge" practice.
Hunwick is dealing with a neck injury that will cause him to miss the entirety of the 2019-20 season. According to general manager Jason Botterill, "After further medical evaluation this offseason, we unfortunately do not expect that Matt will be physically able to play this upcoming season due to a neck condition
Mittelstadt, coming off a somewhat disappointing season where he had just 12 goals and 13 assists in 77 games while mostly serving as the second-line center, has been a workout fanatic this offseason and showed up at a recent team event noticeably bigger and stronger. "Casey, just seeing him here today, I think he's taken a big step," said general manager Jason Botterill. "We challenged him a little bit about some of his conditioning in the summer. I think he's really done that extremely well. I think it's always that first or second year, that's where good players take that jump."
Luukkonen, who underwent hip surgery in April, was back on the ice Wednesday, Lance Lysowski of The Buffalo News reports.
Cozens, who underwent surgery on his left thumb in July, was back on the ice doing drills Wednesday, Lance Lysowski of The Buffalo News reports.
Ullmark signed a one-year, $1.325 million contract with Buffalo on Saturday.
McCabe and the Sabres agreed to a two-year deal Saturday with an average annual value of $2.85 million one day before the defenseman was set to go to arbitration, Lance Lysowski of The Buffalo News reports.