Isaiah McDuffie is a career quality starter β a linebacker whose body of work places McDuffie in the top quarter of all players at the position historically. The Knox model values sustained contribution over flash, and McDuffie's career arc reflects exactly that kind of reliable professional-grade performance.
Isaiah McDuffie
Top 18% all-time linebackersElite Playmaker
Height6'1"
Weight227 lb
BornJul 21, 1999
Age26
ConferenceAtlantic Coast
Rookie yr2021
Draft2021 Β· Rd 6, Pick 220 Β· GB
A top 20% all-time linebacker who consistently made an impact across multiple seasons. Lower snap-level production reinforces the playmaking ability.
Career Value Β· VORP
VORP 61 Β· #1807 Β· Above AverageWorth 61 points of value above a freely-available replacement linebacker β top 40% of all 4,642 ranked at the position. 3 of 4 seasons cleared the replacement bar, by +20.3 on average.See board β
Seasons above replacement
3 cleared
1 replaced
Beat replacement (adds to VORP) Below it β adds 0, never a debit
47
Replacement
the KC-H bar
β
3
Seasons over
cleared the bar
Γ
+20.3
Avg surplus
peak +22
3 seasons Γ ~20.3 surplus β VORP 61
Combined Season Grid
The full season-by-season grids, joined on one timeline. Every selected stat family stays visible at onceβno tab hopping.
3 grids split in one view
| Season | Age | Team | G | GS | Defense | Snap Counts | Advanced Defense & Coverage (2018+) | |||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tkl | Solo | Ast | TFL | QBHits | Sk | Dis | Int | PD | FF | FR | TD | Sfty | Off | Off% | Def | Def% | ST | ST% | Tgt | Cmp | Cmp% | RateAll | ADOT | Prss | Hrry | QBKD | Bltz | MissTkl | Miss% | |||||
| 2021 | β | GB | 13 | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | 0.0% | β | 0.0% | 192 | 57.1% | β | β | β | β | β | β | β | β | β | β | β |
| 2022 | β | GB | 8 | β | 25 | 14 | 11 | 0 | 0 | 0.0 | 0.0 | 0 | 0 | 0 | β | 0 | 0 | β | 0.0% | 174 | 27.9% | 263 | 62.5% | 12 | 9 | 0.8 | 117.7 | 4.4 | 0 | 0 | 0 | 4 | 1 | 0.0 |
| 2023 | β | GB | 11 | β | 69 | 39 | 30 | 5 | 3 | 0.5 | 8.5 | 0 | 1 | 0 | β | 0 | 0 | β | 0.0% | 513 | 60.4% | 202 | 49.5% | 31 | 24 | 0.8 | 103.4 | 4.6 | 4 | 1 | 2 | 19 | 5 | 0.1 |
| 2024 | β | GB | 16 | β | 89 | 38 | 51 | 3 | 3 | 0.5 | 6.5 | 0 | 3 | 1 | β | 0 | 0 | β | 0.0% | 699 | 63.5% | 125 | 29.5% | 56 | 47 | 0.8 | 126.6 | 3.3 | 5 | 2 | 2 | 17 | 10 | 0.1 |
| 2025 | β | GB | 16 | β | 91 | 46 | 45 | 3 | 3 | 1.0 | 7.0 | 1 | 1 | 0 | β | 0 | 0 | β | 0.0% | 505 | 46.0% | 302 | 72.0% | 32 | 22 | 0.7 | 79.3 | 3.4 | 3 | 0 | 1 | 13 | 6 | 0.1 |
| Career | β | 64 | β | 274 | 137 | 137 | 11 | 9 | 2.0 | 22.0 | 1 | 5 | 1 | β | 0 | 0 | β | 0.0% | 1,891 | 49.5% | 1,084 | 54.1% | 131 | 102 | β | β | β | 12 | 3 | 5 | 53 | 22 | β | |
Defense
| Season | Age | Team | G | GS | Tkl | Solo | Ast | TFL | QBHits | Sk | Dis | Int | PD | FF | FR | TD | Sfty | VAL |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022 | 23 | GB | 8 | 0* | 25 | 14 | 11 | 0 | 0 | 0.0 | 0.0 | 0 | 0 | 0 | β | 0 | 0 | 2.4 |
| 2023 | 24 | GB | 11 | 10* | 69 | 39 | 30 | 5 | 3 | 0.5 | 8.5 | 0 | 1 | 0 | β | 0 | 0 | 4.9 |
| 2024 | 25 | GB | 16 | 11* | 89 | 38 | 51 | 3 | 3 | 0.5 | 6.5 | 0 | 3 | 1 | β | 0 | 0 | 7.1 |
| 2025 | 26 | GB | 16 | 0* | 91 | 46 | 45 | 3 | 3 | 1.0 | 7.0 | 1 | 1 | 0 | β | 0 | 0 | 8.3 |
| Career | 51 | 21* | 274 | 137 | 137 | 11 | 9 | β | β | 1 | 5 | 1 | β | 0 | 0 | 22.7 |
* GS not available from free sources β SG* estimated from snap share (nflverse 2012+)
Snap Counts
| Season | Age | Team | G | GS | Off | Off% | Def | Def% | ST | ST% |
|---|---|---|---|---|---|---|---|---|---|---|
| 2021 | 22 | GB | 13 | β | β | 0.0% | β | 0.0% | 192 | 57.1% |
| 2022 | 23 | GB | 17 | 0* | β | 0.0% | 174 | 27.9% | 263 | 62.5% |
| 2023 | 24 | GB | 16 | 10* | β | 0.0% | 513 | 60.4% | 202 | 49.5% |
| 2024 | 25 | GB | 17 | 11* | β | 0.0% | 699 | 63.5% | 125 | 29.5% |
| 2025 | 26 | GB | 17 | 0* | β | 0.0% | 505 | 46.0% | 302 | 72.0% |
| Career | 80 | 21* | β | β | 1,891 | β | 1,084 | β |
* GS not available from free sources β SG* estimated from snap share (nflverse 2012+)
Advanced Defense & Coverage (2018+)
| Season | Age | Team | G | GS | Tgt | Cmp | Cmp% | RateAll | ADOT | Prss | Hrry | QBKD | Bltz | MissTkl | Miss% |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022 | 23 | GB | 17 | 0* | 12 | 9 | 0.8 | 117.7 | 4.4 | 0 | 0 | 0 | 4 | 1 | 0.0 |
| 2023 | 24 | GB | 16 | 10* | 31 | 24 | 0.8 | 103.4 | 4.6 | 4 | 1 | 2 | 19 | 5 | 0.1 |
| 2024 | 25 | GB | 17 | 11* | 56 | 47 | 0.8 | 126.6 | 3.3 | 5 | 2 | 2 | 17 | 10 | 0.1 |
| 2025 | 26 | GB | 17 | 0* | 32 | 22 | 0.7 | 79.3 | 3.4 | 3 | 0 | 1 | 13 | 6 | 0.1 |
| Career | 67 | 21* | 131 | 102 | β | β | β | 12 | 3 | 5 | 53 | 22 | β |
* GS not available from free sources β SG* estimated from snap share (nflverse 2012+)
KV-H Anatomy
KV-H 61 Β· Strong StarterA strong starter career by KV-H: a well-rounded profile that scores 61 of 100, era-normalized against tackles/g peers across 4 scored seasons, with a short career trimming the score.
64
Sustained
career value
Γ.6
67
Peak
best 3 seasons
Γ.4
Γ0.93
Longevity
career length
Blend 65.2 Γ longevity 0.93 = KV-H 61Β· confidence 100%
What builds the career mark of 64
On-field 48
Availability 16
On-field production Staying available
Season-by-season quality (era-relative tackles/g)
2022bestavg 622025
All-Time Standing
how this career measures against the all-time greats at the position1
Depth
of 100
Reached 1% of the all-time Sacks leader β a rotational/depth all-time profile at the position.
1% of the all-time Sacks leader1
0 categories β₯25% of the all-time leader0
A 0β100 scale where 100 = matched the all-time leaderat this position. Built only from visible encyclopedia data β career production vs. the all-time leader, plus efficiency (EPA) and comparable-player confidence β so it's a transparent context score, not a subjective rating. Tiers: Elite β₯ 85 Β· Strong β₯ 65 Β· Solid β₯ 45 Β· Depth < 45. Comparable-player confidence: 90%.
Per-Snap Impact
Linebackers Β· proprietary Β· 2012+37
Rotational
SIS
Disruption/1001.534Snap share49.5%Def snaps1,891VolatileCV 0.59
Production per snap β the box score normalized by opportunity. SIS is z-scored within linebackers, shrinkage-regularized so small samples don't spike, over the NFL snap-count era (2012+).
Career Aging Trajectory
vs. position group average Β· KV-H basisAmber = this player (normalized to own peak). Indigo = average linebackers aging curve. Group peak age: 25. Source: StatVault KV-H era (1999+).
Postseason Career
3 playoff gamesDefense
Tkl15Solo8Ast7QBHits2Sk0.5Dis2.5PD1
College stats are not imported for this profile yet.
StatVault has the verified college attribution (Boston College), but no parsed college box-score table is present in this profile artifact. The section stays here so every profile has a consistent college-stats landing point without fabricating unavailable rows.
Reference Graph
Career teammates and draft class, derived from year-by-year rosters β every name is linked.
Top Teammates
Rashan GaryLB5yElgton JenkinsC5yJordan LoveQB5yPreston SmithDE4yKenny ClarkNT4yKeisean NixonDB4yTedarrell SlatonDT4yJaire AlexanderCB4yJosh MyersC4yKingsley EnagbareLB4yEric StokesCB4yRomeo DoubsWR4yQuay WalkerLB4yDevonte WyattDT4yRasheed WalkerOT4yChristian WatsonWR4yZach TomG4ySean RhyanOT4yEric WilsonLB3yDavid BakhtiariOT3yDe'Vondre CampbellOLB3yAaron JonesRB3yDarnell SavageDB3yYosh NijmanOT3y
2021 Draft ClassΒ· this player went #220
#212Damar HamlinSAF#213Rachad WildgooseCB#214Cole Van LanenG#215Brady BreezeSAF#216Quincy RocheLB#217Khalil HerbertRB#218Sam EhlingerQB#219Seth WilliamsWR#221Dazz NewsomeWR#223Tay GowanCB#224JaCoby StevensLB#225Camaron CheesemanLS#226Trey SmithG#227Israel MukuamuCB#228Thomas Graham Jr.CB#229Mike StrachanWR
Franchise Succession
the room, before and afterIsaiah inherited the Green Bay Packers LB room from De'Vondre Campbell (2021β2023), and handed it to Kingsley Enagbare (2022β2025).
Similar Players
Statistical + physical similarity across every player in the database, position-relevant (0β100%).
Movementderived from season history
- 2025final season
Last recorded season with GB
- 2021draft
Drafted by GB β Round 6, Pick 220
Athletic & Unique Profile
verified measurements and curated source-tagged facts6'1" / 227 lb
Frame
Injury History
From nflverse weekly injury reports Β· coverage begins 2009.
| Season | Team | Games Out | Designations |
|---|---|---|---|
| 2024 | GB | 0 | W13QuestionableΒ· Ankle |
| 2023 | GB | 0 | W18DoubtfulΒ· Concussion / Neck |
Knox
StatVault's proprietary player intelligence, informed by full career data. How Knox works β
Historical Knox Β· KV-H
Era-normalized career quality β z-scored against 4-season peers. See all β
61
peak 67
Season Report CardsΒ· KV-H era-normalized per season
C2022
B2023
B2024
B2025
Availability
Career durability β games played vs. scheduled, across 5 seasons.
94%
Era Translator
Tackles translated to the 2025NFL β each season's standing among its own-era peers, projected onto 2025's scoring environment. Modern-era (1999+) coverage.
| Season | Actual Tackles | Tackles/G | β 2025 Tackles | β 2025 /G |
|---|---|---|---|---|
| 2022 | 25 | 3.1 | 51+26 | 3 |
| 2023 | 69 | 6.3 | 106+37 | 6.2 |
| 2024 | 89 | 5.6 | 94+5 | 5.5 |
| 2025 | 91 | 5.7 | 97+6 | 5.7 |
Data: nflverse:players, nflverse:player_stats_def, nflverse:snap_counts, nflverse:draft_picks, nflverse:injuries Β· multi-source verified via the StatVault Oracle Β· updated 6/18/2026
Career Value Β· VORP
61 career value over replacement β #1807 all-time of 4,642. 15.3/season above a replacement-level LB.
Draft OutcomeSteal β
Pick #220 (Rd 6) Β· GB Β· 2021 Β· +38.2 vs expected KV-H
61actual
22.8 expected Β· Ξ+38.2
Fan Rating
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