Buffalo Sabres general manager Jarmo Kekalainen acquired defenseman Olen Zellweger from the Anaheim Ducks last month in exchange for prospect Anton Wahlberg and the No. 45 pick in the 2026 NHL Draft, but that was just the start of the process.
Kekalainen then had to sign Zellweger, a 22-year-old restricted free agent, to a contract extension, with the sides ultimately reaching an agreement on a three-year, $9.3 million deal ($3.1 million AAV). It's a re-signing that drew praise from Harman Dayal of The Athletic, who called the blueliner a "gifted skater" while discussing the nine best contracts signed so far in NHL free agency.
"After trading Bowen Byram and [Michael] Kesselring, the Sabres needed to add some secondary skating and puck-moving to the back end," Dayal wrote Thursday. "Zellweger is an excellent budget option to fill that hole. He isn't nearly as established as Byram yet and his ceiling is likely lower, especially as a 5-foot-10 defenseman, but the upside of his game is tantalizing."
The 2021 first-round selection, who twice won the Bill Hunter Memorial Trophy as the WHL's Defenseman of the Year as a prospect, put together a promising, albeit incomplete, start to his NHL career with the Ducks.
Zellweger is coming off a season where he posted 22 points (seven goals and 15 assists) across 76 appearances while averaging a shade under 17 minutes per contest. He scored 19 of those points at even strength, and he also racked up 85 blocked shots defensively.
The Calgary native's underlying numbers were also solid in 2025-26, compiling a 51.2% expected goal share and 51.9% high-danger chance share in 5-on-5 situations, per Natural Stat Trick. His three-year weighted wins above replacement (WAR) ranks in the 69th percentile among NHL defensemen, according to HockeyStats.com.
Buffalo is betting his upward trajectory will continue after the trade, especially with ample offensive opportunities available following Byram's trade to the Chicago Blackhawks. It also helps the organization that he'll still be an RFA when the bridge contract expires in 2029.
Olen Zellweger is destined for an offense-first role with the Buffalo Sabres in 2026-27
The Sabres couldn't afford to pay Byram, who received a $12.5 million salary from the Hawks on a six-year extension, that type of money to play on the second pair with limited power-play time.
That's why acquiring cheaper alternatives, including Zellweger and Louis Crevier (part of the Byram return package from Chicago), was the best path forward for Kekalainen.
Those moves, paired with a sign-and-trade agreement sending winger Alex Tuch to the Washington Capitals with a $10.5 million AAV extension, have put Buffalo in a far better situation from a financial perspective, both now and in the future.
The Sabres will need Zellweger to step up to help replace Byram's transition and offensive contributions if the club is going to overcome those notable losses in the short term, though.
Zellweger is always eager to using his high-end skating ability to join the rush, and his point production should increase if he earns a second-pair role next to Owen Power and some PP time with the No. 2 unit, which are both distinct possibilities if he puts together a strong training camp.
Buffalo head coach Lindy Ruff is a stickler for defensive reliability from his bottom-four defensemen, however, and that's an area of necessary growth for the Canadian. So, it's possible he'll bounce between the second and third pairs depending on the situation.
The Sabres are going to hope his D-zone impact will improve enough over time that he'll become a full-time top-four option, but there are legitimate questions about that given his undersized frame. It's possible he'll always be more of a matchup player.
Buffalo has two more defensively focused players, Crevier and Conor Timmins, who will probably rotate in alongside Power in certain moments, at least early in the campaign.
In the bigger picture, the Blue and Gold's outlook on the blue line is incredibly promising, especially as their top prospects reach NHL readiness within the next couple years.
The Sabres have Power, Rasmus Dahlin, Mattias Samuelsson as their defensive core with Zellweger and Crevier aiming to prove they're long-term solutions, as well. Their prospect pool at the position is headlined by two top-10 picks, Radim Mrtka and Daxon Rudolph.
So, by the time Zellweger's contract is up, there will be a lot of internal competition for a spot on the depth chart. That's true even if Kekalainen decides to use a player like Mrtka in a blockbuster trade.
It puts Zellweger in a predicament where the surrounding circumstances give him a golden opportunity to take his game to the next level, but not without pressure on his shoulders to elevate his all-around game enough to fend off the likes of Rudolph, Mrtka and the team's other prospects.
A clearer picture about his true upside will be painted over the next few years in Buffalo.
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