WARpath BuffaloWARpath BuffaloWARpath BuffaloWARpath Buffalo
Seamus Casey
Defense · NJD · NHL

Seamus Casey

Age
22
Height
5'10"
Weight
181 lb
Shoots
R
Drafted
2022, round 2, 46th overall
Born
USA
2025-26
NHL · New Jersey Devils
Games
2
Goals
0
Assists
0
Points
0
Prospect score · 2026-27
Blue chip

13th of 1,160 prospects in the NHLnew

1st in the NJD system · 1st among its defensemen

+1.1WAR a season if he sticks
Outlook
NHL odds75%Becomes a full-time NHL player — 200 games by 26
Impact odds61%Better than the typical NHL regular among defensemen
Arrival2026-27The season his comps who made it typically became regulars
WAR a season if he sticks+0.6+1.1+1.5Low, middle and high outcomes among his comparables who became regulars

Of the 10 players most like him at the same point in their development, 8 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+3161718192021Age2020-21, age 16, 76 GP: +1.66 vs. his age group (0.12 NHL-equivalent points per game)2021-22, age 17, 65 GP: +0.83 vs. his age group (0.12 NHL-equivalent points per game)2022-23, age 18, 37 GP: +1.47 vs. his age group (0.20 NHL-equivalent points per game)2023-24, age 19, 40 GP: +1.90 vs. his age group (0.29 NHL-equivalent points per game)2024-25, age 20, 44 GP: +1.96 vs. his age group (0.36 NHL-equivalent points per game)2025-26, age 21, 29 GP: +0.95 vs. his age group (0.28 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
1Slava Voynov2008 · #32 · at 2239%190190Did not stick—
2Travis Dermott2015 · #34 · at 2236%329348Regular+0.57
3Sami Vatanen2009 · #106 · at 2236%337473Regular+0.73
4Tyson Barrie2009 · #64 · at 2234%406822Regular+1.19
5Vince Dunn2015 · #56 · at 2233%480631Regular+1.38
6Ian Mitchell2017 · #57 · at 2231%110110Did not stick—
7Roman Josi2008 · #38 · at 2231%4061037Regular+1.70
8Ryan Ellis2009 · #11 · at 2231%396566Regular+2.16
9Will Butcher2013 · #123 · at 2330%275275Regular+0.55
10Jared Spurgeon2008 · #156 · at 2230%4481018Regular+1.49
Season by season
SeasonGPGAPtsPIM
2025-26NHL · New Jersey Devils20000
2025-26AHL · Utica Comets291181913
2024-25NHL · New Jersey Devils144480
2024-25AHL · Utica Comets30315188
2023-24WJC-20 · USA U2060662
2023-24NCAA · Univ. of Michigan407384514
2022-23NCAA · Univ. of Michigan37821299
2021-22WJC-18 · USA U1863362
2021-22USHL · USNTDP Juniors17310132
2021-22NTDP · U.S. National U18 Team4810233314
2020-21USHL · USNTDP Juniors30218208
2020-21NTDP · U.S. National U17 Team468283616
2019-20YOG · USA U1640002
2019-20USA-S15 · Team Purple41120
2019-20NAPHL 16U · Florida Alliance 16U AAA151118294
2018-19WSI U15 · East Coast Selects O U15978154
2018-19HPHL 14U · Compuware 14U AAA17157220
2017-18HPHL 13U · Compuware 13U AAA1678150
2016-17WSI U13 · Pro Hockey Selects U1360000
2015-16WSI U12 · Pro Hockey Selects U1292350
2013-14Brick Invitational · Team Brick Alberta60112

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