Buffalo Sabres defenseman Olen Zellweger (concussion) is in danger of missing the start of the 2026-27 campaign after being hurt during Tuesday's preseason action. In a game against the Columbus Blue Jackets, Zellweger suffered a concussion. He was hurt in the second period when Blue Jackets defenseman Carson Soucy delivered a big hit. Zellweger is a fresh face in Buffalo after the team acquired him from the Anaheim Ducks this offseason. Following a back-to-back 20-point campaign, he will look to take the next step in 2026-27. Buffalo also lost Mattias Samuelsson (undisclosed) on Tuesday night, a further blow to their blue line just a week before the season opener.

Philadelphia Flyers goaltender Dan Vladar (upper body) saw his night end early in Tuesday's preseason contest against the Boston Bruins. He left the game in the first period due to an upper-body injury. Vladar allowed one goal on seven Boston attempts. The Czech netminder had an impressive debut campaign in Philadelphia, posting a 29-14-7 record, a 2.42 goals-against average, and a .906 save percentage. The Flyers will be sweating over his health before opening night. If Vladar misses time, Joseph Woll could take on an increased workload.

Anaheim Ducks defenseman Drew Helleson (lower body) has been ruled out until next week, Zach Cavanagh of The Sporting Tribune reports. The 25-year-old is dealing with a lower-body injury and will miss the rest of the preseason. However, Ducks head coach Joel Quenneville hopes to have Helleson available for the regular-season opener. Early in his NHL career, Helleson has showcased versatility. He finished last season with 15 points (two goals, 13 assists), 39 SOG, 79 blocks, and 63 hits in 60 games. Moving forward, Helleson must improve his offensive output to become a viable fantasy option.

Dallas Stars forward Matt Duchene (undisclosed) is expected to skate on Wednesday. The two-time All-Star has been granted maintenance days at the start of training camp as a precaution. Dallas had Duchene in the lineup only 57 times last season and is being cautious with his health. Duchene played well when available, averaging nearly 0.8 points. He was a point-per-game player in 2024-25, so another 60-point campaign should be well within his reach this season. The Stars also hope to have fellow forward Colin Blackwell (lower body) back on the ice Wednesday.