The Buffalo Sabres are reportedly close to finalizing a deal that would send winger JJ Peterka to the Utah Mammoth in exchange for forward prospect Josh Doan and defenseman Michael Kesselring, per Sportsnet’s Elliotte Friedman. It’s been further announced that Peterka has agreed to a five-year, $38.5MM extension with the Mammoth, per Pierre LeBrun of The Athletic. The Mammoth later confirmed the trade and signing. It’s a late-night blockbuster, and a rare three-player swap with no additions.
Utah has now completed the franchise’s biggest trade under its new moniker. In Peterka, the Mammoth have acquired a consistent goal-scorer they can plug into their top six without having to part with too many quality assets. Kesselring and Doan filled important needs for the team last season, but they didn’t replicate what Peterka can bring to their offense.
The German-born winger was selected by the Sabres as the 34th overall pick in the 2020 NHL Draft, coming from EHC München in the DEL. A year later, after scoring nine goals and 20 points in 30 DEL contests and 10 points in only five World Junior Championship games, the Sabres knew that it wouldn’t be long before Peterka debuted in North America.
He did just that the following season. Primarily playing for the team’s AHL affiliate, the Rochester Americans, Peterka gave an impressive rookie performance, scoring 28 goals and 68 points in 70 games. Despite being named to the All-Rookie Team and finishing 10th in AHL scoring, Peterka lost out on the Dudley “Red” Garrett Memorial Award as the league’s most outstanding rookie to teammate Jack Quinn.
Despite playing in two games during the 2021-22 campaign, Peterka made the full transition to NHL hockey in 2022-23 and never looked back. Being a capable tertiary scorer during the 2022-23 campaign with limited ice time, Peterka became a full-fledged top-six winger the last two seasons, scoring 55 goals and 118 points in 159 games played.
Peterka has some defensive shortcomings to work on, which is to be expected of any young winger. Still, he brings a wealth of offensive capabilities and possession quality to plug into a similarly styled offense in Salt Lake City. Peterka will join the likes of Logan Cooley, Clayton Keller, Nick Schmaltz, Dylan Guenther, and Barrett Hayton and the Mammoth’s top-six, with every player falling under the age of 30.
Meanwhile, Buffalo adds a young, right-handed defenseman whom they’ve been coveting for some time. The team was oversaturated on the left side last season, with all four of the team’s highest-paid blue liners shooting from the left. Even at 25 years old, Kesselring has already proven to be a capable puck-moving defenseman who can hold his own in the defensive zone.
It’s hard to imagine the Mammoth thought Kesselring would become the player he is. The Arizona Coyotes acquired Kesselring from the Edmonton Oilers in 2023 as part of the Nick Bjugstad trade, whom they later re-signed the following offseason. They quickly assigned him to the AHL’s Tucson Roadrunners.
Since then, Kesselring has scored 12 goals and 50 points in 147 NHL contests, jumping into a top-four role with the formerly named Utah Hockey Club last season. The scoring totals may not stand out, but his possession and defensive metrics are impressive. He finished the 2024-25 campaign with a 53.7% CorsiFor% at even strength, and a on-ice save percentage of 92.2%. His positive possession quality should help the Sabres dramatically, as they finished the 2024-25 campaign as the league’s 17th-best possession team.
Lastly, Doan, the son of former Coyotes icon Shane Doan, comes to the Sabres organization without having made his mark on the NHL level. The former 37th overall pick in the 2021 NHL Draft has been a productive AHL scorer since his draft year, accumulating 40 goals and 78 points in 104 games.
Still, that talent hasn’t yet translated to the NHL level, and much of that can be explained by a lack of ice time. Doan finished the 2024-25 campaign with seven goals and 21 points in 51 games, averaging 13:31 seconds of ice time in a third-line role. Unfortunately, given the talent that the Sabres have on the wing in their top-six, Doan is likely destined for the same role in New York.
PHR’s Brennan McClain contributed significantly to this article.
Photo courtesy of Nick Turchiaro-Imagn Images.