The Buffalo Sabres didn’t land Olen Zellweger by accident. They pivoted into him after realizing Bowen Byram wasn’t going to be part of a long-term extension, and the move has already been singled out as one of the NHL’s most meaningful offseason swings.
General manager Jarmo Kekalainen started the summer hoping to keep Byram in Buffalo. When that path closed, he moved fast.
Byram and forward Jordan Greenway went to the Chicago Blackhawks for two top-50 picks in the 2026 NHL Draft, Nos. 4 and 45, plus defenseman Louis Crevier. Buffalo then sent the No. 45 pick and prospect Anton Wahlberg to the Anaheim Ducks for Zellweger, an offensively gifted defenseman with plenty of intrigue.
That second deal is the one that caught Sportsnet’s Justin Arenburg’s attention. He listed Zellweger among the league’s “10 most impactful” moves this summer.
"The Sabres decided to grab a more cost-effective defenseman in Zellweger, who projects to have a similar profile to Byram, at least offensively," Arenburg wrote Tuesday. "Even though Zellweger might not have the same impact as Byram, this move also allowed the Sabres to sign Zach Benson to a seven-year deal with a $7.5 million AAV, effectively locking in Buffalo's core moving forward."
The financial side is a huge part of the story here. Keeping Byram and winger Alex Tuch would have cost Buffalo $23 million per season based on the contracts they signed with the Hawks and Washington Capitals, respectively. By comparison, Benson, Zellweger and Crevier combine for $11.5 million, exactly half that number.
That kind of savings matters for a team that entered the summer with a minor cap crunch. Buffalo now has $5.1 million left for 2026-27, and PuckPedia projects that number to jump all the way to $36.7 million the following offseason.
That gives Kekalainen real room to maneuver. The Sabres can chase a major name in free agency or swing a trade as they keep hunting for a true No. 1 center and/or a new starting goalie.
Zellweger is the bet at the center of it all. The 2021 second-round pick has shown enough in three seasons with Anaheim to make the upside obvious, especially when it comes to moving the puck.
Last season, the 5-foot-10 defenseman ranked in the 98th percentile of carry exits and the 84th percentile of generating rush offense at his position, according to HockeyStats.com. He also finished in the 92nd percentile in shot contributions among blueliners.
The raw production hasn’t fully caught up yet. In 76 games for Anaheim in 2025-26, he put up 22 points, including seven goals and 15 assists. But the numbers point to a player whose game still has room to grow.
The big question is whether Zellweger can sharpen the defensive side enough to become a trusted top-four option in Buffalo. His size and physicality are the obvious concerns. He had 84 hits in 164 career games, and he was even a healthy scratch at times for the Ducks because of trouble in his own end.
He is not being asked to become Rasmus Dahlin. But if Zellweger can clean up the defensive details and pair that with an offensive jump, he could fit nicely as a second-pair option alongside Owen Power, at least for now.
Buffalo also used the No. 4 pick in this year’s draft on defenseman Daxon Rudolph, who looks like the long-term partner for Power and could arrive as early as 2027-28. If that plays out, Zellweger could still hold value as a puck-moving third-pair defenseman and occasional power-play piece.
The Sabres’ blue line could be loaded if the young talent develops the way the front office expects. Zellweger is a major part of that picture, and if he doesn’t take the next step, Kekalainen may have to look for a bridge option on the second pair until Rudolph is ready.
There is also a version of this where the fit works right away. Zellweger’s aggressive style and Buffalo’s up-tempo approach could mesh well.
Either way, the Sabres clearly believe there’s more in there. Zellweger leaves Southern California for Western New York with plenty of believers behind him.
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