Lehner won't require surgery to correct his lower-body injury, Mike Harrington of The Buffalo News reports.
Falk skated in just 46 games in 2017-18, scoring only one goal and one assist while logging 121 hits.
Josefson (lower body) may opt to return to his native Sweden next season, Mike Harrington of The Buffalo News reports.
Lehner (lower body) was absent from the team's locker room cleanout, as he was out of town to get a second opinion regarding his injury, Mike Harrington of The Buffalo News reports.
Wilcox was reassigned to AHL Rochester on Sunday.
Ullmark (concussion) was reassigned to AHL Rochester on Sunday.
Nelson was reassigned to AHL Rochester on Sunday.
Guhle was reassigned to AHL Rochester on Sunday.
Porter was reassigned to AHL Rochester on Sunday.
Nylander was reassigned to AHL Rochester on Sunday.
Baptiste was reassigned to AHL Rochester on Sunday.
Ullmark (concussion) isn't likely to be available for Saturday's season finale against the Panthers, as Mike Harrington of The Buffalo News reports Chad Johnson will start with Adam Wilcox potentially entering later in the contest for his NHL debut.
Nylander scored his first NHL goal in Friday's loss to the Lightning.
Mittelstadt scored his first NHL goal in Friday's loss to the Lightning.
Guhle registered two assists through 19:15 of ice time during Friday's 7-5 loss to Tampa Bay.
Wilson earned a helper in Wednesday's matchup with Ottawa.
Ullmark (concussion) -- who will be afforded an opportunity to win the starting gig next season -- will travel with the team as it embarks on the final road trip of the season, Paul Hamilton of WGR Sports Radio 550 reports.
Lehner (lower body) will not travel to Florida for games against the Lightning and Panthers, respectively, Paul Hamilton of WGR Sports Radio 550 reports.
Nylander, who was called up from AHL Rochester on Tuesday, will skate alongside Casey Mittelstadt against Tampa on Friday, Sportsnet's Elliotte Friedman reports.
Ullmark will get a chance to win the No. 1 job next season, Sportsnet's Elliotte Friedman reports.
The Sabres front office believes Malone can carve out a role with the big club at his current rate of progression, Sportsnet's Elliotte Friedman reports.
O'Reilly scored one of his team's two goals in a 4-2 setback against Ottawa on Monday.
Beaulieu skated for 13:28, failing to score in a 4-2 loss to Ottawa on Wednesday.
Guhle (upper body) will rejoin the lineup for Wednesday's game against the Senators.
Lehner (lower body) remains day-to-day and won't suit up for Wednesday's game against Ottawa.