WARpath BuffaloWARpath BuffaloWARpath BuffaloWARpath Buffalo
Olen Zellweger
Defense · BUF · NHL

Olen Zellweger

Age
23
Height
5'10"
Weight
193 lb
Shoots
L
Drafted
2021, round 2, 34th overall
Born
CAN
2026-27
NHL · Buffalo Sabres
Games
7
Goals
2
Assists
1
Points
3

His NHL ratings and game log →

Prospect score · 2026-27
High end

NHL regular, measured on the prospect scale

5th among BUF players 23 and under

+0.6WAR a season if he sticks
Outlook
NHL odds88%Becomes a full-time NHL player — 200 games by 26
Impact odds42%Better than the typical NHL regular among defensemen
ArrivalArrived171 NHL games so far
WAR a season if he sticks+0.1+0.6+1.2Low, middle and high outcomes among his comparables who became regulars

Of the 10 players most like him at the same point in their development, 9 became full-time NHL players.

Development

His scoring, converted to an NHL equivalent, against every player his age and position that season. Zero is the average player his age; the band is where his comparables were at each age.

-10+1+2+31516171819202122Age2018-19, age 15, 35 GP: -0.09 vs. his age group (0.04 NHL-equivalent points per game)2019-20, age 16, 58 GP: -0.54 vs. his age group (0.04 NHL-equivalent points per game)2020-21, age 17, 11 GP: +2.56 vs. his age group (0.21 NHL-equivalent points per game)2021-22, age 18, 55 GP: +2.18 vs. his age group (0.25 NHL-equivalent points per game)2022-23, age 19, 55 GP: +1.55 vs. his age group (0.26 NHL-equivalent points per game)2023-24, age 20, 70 GP: +1.95 vs. his age group (0.36 NHL-equivalent points per game)2024-25, age 21, 62 GP: +1.26 vs. his age group (0.32 NHL-equivalent points per game)2025-26, age 22, 76 GP: +0.74 vs. his age group (0.29 NHL-equivalent points per game)
HimMiddle half of his comps at that ageAverage player his age
Comparables

Past prospects at the same position and the same stage after their draft, matched on draft slot, age, size and league-adjusted production. What they became is already known. The outcome is judged at 26: 200 NHL games by then makes a regular.

#PlayerMatchNHL GP by 26Career NHL GPOutcomeWAR a season
1Mario Ferraro2017 · #49 · at 2351%490497Regular+0.14
2Ryan Lindgren2016 · #49 · at 2348%405485Regular+0.62
3Henri Jokiharju2017 · #29 · at 2347%448448Regular+0.45
4Ian Mitchell2017 · #57 · at 2345%110110Did not stick—
5Travis Dermott2015 · #34 · at 2343%329348Regular+0.57
6Dante Fabbro2016 · #17 · at 2341%377451Regular+0.53
7Jake McCabe2012 · #44 · at 2341%353731Regular+0.49
8Rasmus Andersson2015 · #53 · at 2341%455626Regular+1.16
9Travis Hamonic2008 · #53 · at 2339%444926Regular+0.31
10Oliver Kylington2015 · #60 · at 2339%201220Regular+0.59
Season by season
SeasonGPGAPtsPIM
2026-27NHL · Buffalo Sabres72136
2025-26NHL · Anaheim Ducks767152234
2024-25NHL · Anaheim Ducks627132020
2023-24WC · Canada100552
2023-24NHL · Anaheim Ducks262794
2023-24International · Team Canada21010
2023-24AHL · San Diego Gulls4412253716
2022-23WJC-20 · Canada U2070664
2022-23WHL · Everett Silvertips5532488040
2022-23Memorial Cup · Kamloops Blazers41342
2021-22WJC-20 · Canada U20729112
2021-22WHL · Everett Silvertips5514647823
2020-21WJC-18 · Canada U1871782
2020-21WHL · Everett Silvertips11211132
2019-20WHL · Everett Silvertips58210128
2019-20WHC-17 · Canada Red U1750222
2018-19WHL · Everett Silvertips10000
2018-19CWG · Team Alberta61124
2018-19CSSHL U18 · OHA Edmonton U18 Prep358192722
2017-18WSI U15 · Upstate Kings U15521312
2017-18CSSHL U15 · OHA Edmonton U15 Prep3010223216
2017-18Alberta Cup · Team Edmonton Blue51120
2016-17AMBHL · Fort Saskatchewan Ranger U15 AAA36310132
2014-15WSI U12 · Western Canada Selects U1271452

The prospect score is a percentile of his expected outcome among every prospect in the league: the chance he becomes a regular, times how good his comparables who did became against others at their position. A player who never sticks counts as zero, which is why a long shot with a high ceiling can rank below a safe bet. All Sabres prospects · How the rankings work