A running back who maximized value through excellent availability over their career. Their developmental was extended by consistently being on the field.
Worth 0 points of value above a freely-available replacement running back — top 97% of all 4,642 ranked at the position. 0 of 3 seasons cleared the replacement bar, by +0 on average.See board →
Seasons above replacement
0 seasons × ~0 surplus ≈ VORP 0
The full season-by-season grids, joined on one timeline. Every selected stat family stays visible at once—no 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 | |||||
| 2007 | — | TB | 1 | — | 2 | 9 | 0 | 4.5 | 0.0 | 1 | 50.0 | 0 | 2 | 2 | 16 | 0 | 100.0% | 8.0 | 8.0 | — | 0 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2007 | — | CAR | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 0 | 0 | 0 | 0.0 | 0.0 | 0 | 0 | 0 | — | 0 | 0 | — | — | — | — | — |
| 2007 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 0.4 | 0.9 | 0 | 1 |
| 2008 | — | LA | 7 | — | 32 | 140 | 0 | 4.4 | 0.0 | 9 | 28.1 | 1 | 19 | 19 | 183 | 0 | 100.0% | 9.6 | 9.6 | — | 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2008 | — | NYJ | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 0 | 0 | 0 | 0.0 | 0.0 | 0 | 0 | 0 | — | 0 | 0 | — | — | — | — | — |
| 2008 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | -3.2 | 4.2 | 0 | 20 |
| 2009 | — | LA | 14 | — | 27 | 152 | 0 | 5.6 | 0.0 | 5 | 18.5 | 0 | 24 | 18 | 96 | 0 | 75.0% | 5.3 | 4.0 | — | 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2009 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1.5 | -5.3 | 0 | 26 |
| 2010 | — | LA | 13 | — | 34 | 107 | 2 | 3.1 | 5.9 | 7 | 20.6 | 0 | 13 | 10 | 61 | 1 | 76.9% | 6.1 | 4.7 | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2010 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | -4.0 | -3.8 | 0 | -22 |
| Career | — | 37 | — | 95 | 408 | 2 | 4.3 | 2.1 | 22 | 23.2 | 1 | 58 | 49 | 356 | 1 | 84.5% | 7.3 | 6.1 | — | 16 | 2 | 2 | 0 | 0 | 0 | 0.0 | 0.0 | 0 | 0 | 0 | — | 0 | 0 | — | -5.4 | -4.0 | 0 | 25 | |
A solid career by KV-H: a remarkably steady profile that scores 40 of 100, era-normalized against rush yds/g peers across 3 scored seasons, with a short career trimming the score.
Blend 46.6 × longevity 0.86 = KV-H 40· confidence 96%
Season-by-season quality (era-relative rush yds/g)
Reached 3% of the all-time Receptions leader — a rotational/depth all-time profile at the position.
A 0–100 scale where 100 = matched the all-time leaderat this position. Built only from visible encyclopedia data — career production vs. the all-time leader, plus efficiency (EPA) and comparable-player confidence — so it's a transparent context score, not a subjective rating. Tiers: Elite ≥ 85 · Strong ≥ 65 · Solid ≥ 45 · 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+).
Percentiles compare each raw measurement against position peers, the full combine pool, and the same draft class where enough samples exist.
College stats are not imported for this profile yet.
StatVault has the verified college attribution (Alabama), 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 — every name is linked.
Statistical + physical similarity across every player in the database, position-relevant (0–100%).
Last recorded season with LA
Joined LA (from TB)
Drafted by TB — Round 7, Pick 246
From nflverse weekly injury reports · coverage begins 2009.
| Season | Team | Games Out | Designations |
|---|---|---|---|
| 2010 | STL | 0 | W14Doubtful· RibsW15Questionable· Chest |
StatVault's proprietary player intelligence, informed by full career data. How Knox works →
Era-normalized career quality — z-scored against 3-season peers. See all →
Career durability — games played vs. scheduled, across 4 seasons.
Rush Yds translated to the 2025NFL — 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 | → 2025 Rush Yds | → 2025 /G |
|---|---|---|---|---|
| 2008 | 140 | 20 | 334+194 | 19.6 |
| 2009 | 152 | 10.9 | 197+45 | 11.6 |
| 2010 | 107 | 8.2 | 189+82 | 11.1 |
Data: nflverse:players, nflverse:player_stats, nflverse:player_stats_def, nflverse:combine, nflverse:draft_picks, nflverse:advanced-epa (CC-BY 4.0), nflverse:injuries · multi-source verified via the StatVault Oracle · updated 6/18/2026
Career Value · VORP
0 career value over replacement — #4436 all-time of 4,642. 0/season above a replacement-level RB.
Pick #246 (Rd 7) · TB · 2007 · +17.5 vs expected KV-H
Fan Rating
Rate Kenneth Darby — All-Time
Explore More
Similar Players
Composite score across availability, IR frequency, and injury severity. See all →
Jonathan Grimes
RB
89% match
2007 Draft ClassmatesFull class →