A running back with a developmental β a rotational or backup contributor who filled their role reliably.
Worth 16 points of value above a freely-available replacement running back β top 72% of all 4,642 ranked at the position. 1 of 3 seasons cleared the replacement bar, by +16 on average.See board β
Seasons above replacement
1 seasons Γ ~16 surplus β VORP 16
The full season-by-season grids, joined on one timeline. Every selected stat family stays visible at onceβno tab hopping.
| Season | Age | Team | G | GS | Rushing | Receiving | Defense | Advanced (EPA) | |||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Att | Yds | TD | Y/A | TD% | 1D | 1D% | Fmb | Tgt | Rec | Yds | TD | Ctch% | Y/R | Y/Tgt | AirYd/T | 1D | Tkl | Solo | Ast | TFL | QBHits | Sk | Dis | Int | PD | FF | FR | TD | Sfty | Pass EPA | Rush EPA | Rec EPA | Pass AirYd | Rec AirYd | |||||
| 1999 | β | MIA | 13 | β | 163 | 554 | 4 | 3.4 | 2.5 | 26 | 16.0 | 1 | 23 | 15 | 100 | 0 | 65.2% | 6.7 | 4.3 | β | 2 | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β |
| 1999 | β | ARI | 1 | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | 1 | 1 | 0 | 0 | 0 | 0.0 | 0.0 | 0 | 0 | 0 | β | 0 | 0 | β | β | β | β | β |
| 1999 | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | -24.6 | -5.0 | 0 | 0 |
| 2000 | β | MIA | 8 | β | 48 | 163 | 1 | 3.4 | 2.1 | 5 | 10.4 | 0 | 11 | 9 | 55 | 0 | 81.8% | 6.1 | 5.0 | β | 2 | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β |
| 2000 | β | CIN | 1 | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | 1 | 1 | 0 | 0 | 0 | 0.0 | 0.0 | 0 | 0 | 0 | β | 0 | 0 | β | β | β | β | β |
| 2000 | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | -3.3 | -4.8 | 0 | 0 |
| 2001 | β | MIA | 4 | β | 5 | 22 | 0 | 4.4 | 0.0 | 0 | 0.0 | 0 | 6 | 4 | 21 | 0 | 66.7% | 5.3 | 3.5 | β | 2 | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β |
| 2001 | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | β | -1.6 | -2.9 | 0 | 0 |
| Career | β | 27 | β | 216 | 739 | 5 | 3.4 | 2.3 | 31 | 14.4 | 1 | 40 | 28 | 176 | 0 | 70.0% | 6.3 | 4.4 | β | 6 | 2 | 2 | 0 | 0 | 0 | 0.0 | 0.0 | 0 | 0 | 0 | β | 0 | 0 | β | -29.5 | -12.8 | 0 | 0 | |
A solid career by KV-H: a remarkably steady profile that scores 43 of 100, era-normalized against rush yds/g peers across 3 scored seasons, with a short career trimming the score.
Blend 49.8 Γ longevity 0.86 = KV-H 43Β· confidence 83%
Season-by-season quality (era-relative rush yds/g)
Reached 4% of the all-time Rushing Yards leader β a rotational/depth all-time profile at the position.
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: 89%.
Amber = this player (normalized to own peak). Indigo = average RBs aging curve. Group peak age: 21. Source: StatVault KV-H era (1999+).
College stats are not imported for this profile yet.
StatVault has the verified college attribution (Mississippi State; East Mississippi JC), 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.
Career teammates and draft class, derived from year-by-year rosters β every name is linked.
J.J. inherited the Miami Dolphins RB room from Stanley Pritchett (1996β1999), and handed it to Rob Konrad (1999β2004).
Statistical + physical similarity across every player in the database, position-relevant (0β100%).
Last recorded season with MIA
Drafted by MIA β Round 2, Pick 39
StatVault's proprietary player intelligence, informed by full career data. How Knox works β
Era-normalized career quality β z-scored against 3-season peers. See all β
Career durability β games played vs. scheduled, across 3 seasons.
Rush Yds 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 Rush Yds | Rush Yds/G | β 2025 Rush Yds | β 2025 /G |
|---|---|---|---|---|
| 1999 | 554 | 42.6 | 941+387 | 55.3 |
| 2000 | 163 | 20.4 | 528+365 | 31.1 |
| 2001 | 22 | 5.5 | 244+222 | 14.3 |
Data: nflverse:players, nflverse:player_stats, nflverse:player_stats_def, nflverse:draft_picks, nflverse:advanced-epa (CC-BY 4.0) Β· multi-source verified via the StatVault Oracle Β· updated 6/18/2026
Career Value Β· VORP
16 career value over replacement β #3302 all-time of 4,642. 5.3/season above a replacement-level RB.
Pick #39 (Rd 2) Β· MIA Β· 1999 Β· -6.8 vs expected KV-H
Fan Rating
Rate J.J. Johnson β All-Time
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Composite score across availability, IR frequency, and injury severity. See all β
The room is reconstructed from arrival order among durable members (β₯4 seasons with the club) at the playerβs position group β a lineage by arrival, not a week-by-week depth chart. Distinct from the league-wide positional GOAT torch.
Peyton Barber
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87% match
1999 Draft ClassmatesFull class β
Gave the Miami Dolphins an entire corpus-attributed career β 3 seasons (1999β2001), one crest. The rarest loyalty in the sport.