Not to be confused withDerrick Harmon (DL · 2025).

RBSF#24ACT

Derrick Harmon

Durable ContributorTwo-Way Profile

Height5'10"

Weight202 lb

BornApr 26, 1963

Age63

CollegeCornell See College Stats

Rookie yr1984

Draft1984 · Rd 9, Pick 248 · SFO

Archetype Intelligence

Durable ContributorExplore archetypes →

A running back who maximized value through excellent availability over their career. Their developmental was extended by consistently being on the field.

Career Value · VORP

VORP 8 · #3724 · Role Player

Worth 8 points of value above a freely-available replacement running back — top 81% of all 4,642 ranked at the position. 2 of 3 seasons cleared the replacement bar, by +4 on average.See board →

Seasons above replacement

2 cleared

1 replaced

Beat replacement (adds to VORP) Below it — adds 0, never a debit

Replacement

the KC-H bar

→

Seasons over

cleared the bar

Avg surplus

peak +6

2 seasons × ~4 surplus ≈ VORP 8

Combined Season Grid

The full season-by-season grids, joined on one timeline. Every selected stat family stays visible at once—no tab hopping.

4 grids split in one view

Season	Age	Team	G	GS	Rushing								Receiving									Passing													Defense
Season	Age	Team	G	GS	Att	Yds	TD	Y/A	TD%	1D	1D%	Fmb	Tgt	Rec	Yds	TD	Ctch%	Y/R	Y/Tgt	AirYd/T	1D	Cmp	Att	Cmp%	Yds	TD	Int	TD%	Int%	Y/A	AdjY/A	TD:INT	Rate	Sk	Tkl	Solo	Ast	TFL	QBHits	Sk	Dis	Int	PD	FF	FR	TD	Sfty
1984	—	SF	16	—	39	192	1	4.9	2.6	—	—	—	—	1	2	0	—	2.0	—	—	—	0	2	0.0%	0	0	0	0.0	0.0	0.0	0.0	—	39.6	0	8	8	—	—	—	0.0	0.0	—	0	0	—	—	—
1985	—	SF	15	—	28	92	0	3.3	0.0	—	—	—	—	14	123	0	—	8.8	—	—	—	0	1	0.0%	0	0	0	0.0	0.0	0.0	0.0	—	39.6	0	15	12	—	—	—	0.0	0.0	—	0	0	—	—	—
1986	—	SF	8	—	27	77	1	2.9	3.7	—	—	—	—	8	78	0	—	9.8	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	3	2	—	—	—	0.0	0.0	—	0	0	—	—	—
Career		—	39	—	94	361	2	3.8	2.1	—	—	—	0	23	203	0	—	8.8	—	—	—	0	3	0.0%	0	0	0	0.0	0.0	0.0	0.0	—	39.6	0	26	22	—	—	—	0.0	0.0	0	0	0	0	—	—

Passing

Season	Age	Team	G	GS	Att	Cmp%	AdjY/A	TD:INT	Rate	VAL
1984	21	SF	16	—	2	0.0%	0.0	—	39.6	7.3
1985	22	SF	15	—	1	0.0%	0.0	—	39.6	6.3
Career			31		3	0.0%	—	—	39.6	18

Rushing

Season	Age	Team	G	GS	Att	Yds	TD	Y/A	TD%	1D	1D%	Fmb
1984	21	SF	16	—	39	192	1	4.9	2.6	—	—	—
1985	22	SF	15	—	28	92	0	3.3	0.0	—	—	—
1986	23	SF	8	—	27	77	1	2.9	3.7	—	—	—
Career			39		94	361	2	3.8	—	—	—	—

Receiving

Season	Age	Team	G	GS	Tgt	Rec	Yds	Ctch%	Y/R	Y/Tgt	AirYd/T	1D
1984	21	SF	16	—	—	1	2	—	2.0	—	—	—
1985	22	SF	15	—	—	14	123	—	8.8	—	—	—
1986	23	SF	8	—	—	8	78	—	9.8	—	—	—
Career			39		0	23	203	—	8.8	—	—	—

Defense

Season	Age	Team	G	GS	Tkl	Solo	Ast	TFL	QBHits	Sk	Dis	Int	FR	TD	Sfty
1984	21	SF	—	—	8	8	—	—	—	0.0	0.0	—	—	—	—
1985	22	SF	—	—	15	12	—	—	—	0.0	0.0	—	—	—	—
1986	23	SF	—	—	3	2	—	—	—	0.0	0.0	—	—	—	—
Career					26	22	—	—	—	—	—	0	0	—	—

KV-H Anatomy

KV-H 44 · Solid

A solid career by KV-H: a remarkably steady profile that scores 44 of 100, era-normalized against rush yds/g peers across 3 scored seasons, with a short career trimming the score.

Sustained

career value

×.6

Peak

best 3 seasons

×.4

×0.86

Longevity

career length

Blend 51.6 × longevity 0.86 = KV-H 44· confidence 100%

What builds the career mark of 52

On-field 34.6

Availability 17.4

On-field production Staying available

Season-by-season quality (era-relative rush yds/g)

1984bestavg 511986

All-Time Standing

how this career measures against the all-time greats at the position

Depth

of 100

Reached 2% of the all-time Rushing Yards leader — a rotational/depth all-time profile at the position.

2% of the all-time Rushing Yards leader2

0 categories ≥25% of the all-time leader0

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: 92%.

Career Aging Trajectory

vs. position group average · KV-H basis

Amber = this player (normalized to own peak). Indigo = average RBs aging curve. Group peak age: 21. Source: StatVault KV-H era (1999+).

College Stats

CornellCollege listed; stat table pending import

College stats are not imported for this profile yet.

StatVault has the verified college attribution (Cornell), 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 — every name is linked.

Top Teammates

Ronnie LottCB3y Roger CraigRB3y Mike WilsonWR3y John FrankTE3y Jerry RiceWR2y Earl CooperRB2y Charles HaleyDE1y Tom RathmanRB1y Joe CribbsRB1y Ken MargerumWR1y

1984 Draft Class· this player went #248

#191Scott CampbellQB #192Derwin WilliamsWR #203Billy GriggsTE #212Brad AndersonWR #225Rick MalloryG #237Brian HansenP #245Chris BrewerRB #247Rich ErenbergRB #250Jim BoyleOT #270Randall MorrisRB #272Bobby MichoTE #279Keith GriffinRB #280Earnest BynerRB #281Blair KielQB #283Frank CephousRB #286Buford McGeeRB

Franchise Succession

the room, before and after

Derrick inherited the San Francisco 49ers RB room from Roger Craig (1983–1990), and handed it to Joe Cribbs (1986–1987).

Earl Cooper 1980–1985Roger Craig 1983–1990Derrick Harmon 1984–1986Joe Cribbs 1986–1987Tom Rathman 1986–1993Keith Henderson

Similar Players

Statistical + physical similarity across every player in the database, position-relevant (0–100%).

Movementderived from season history

1986final season
Last recorded season with SF
1984draft
Drafted by SFO — Round 9, Pick 248
1984team change
Joined SF (from SFO)

Athletic & Unique Profile

verified measurements and curated source-tagged facts

5'10" / 202 lb

Frame

Knox

StatVault's proprietary player intelligence, informed by full career data. How Knox works →

Historical Knox · KV-H

Era-normalized career quality — z-scored against 3-season peers. See all →

peak 51

Season Report Cards· KV-H era-normalized per season

C+1984

C+1985

C1986

Availability

Career durability — games played vs. scheduled, across 3 seasons.

81%

19841986

1986 · cause not documented · 50%

Era Translator

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
1984	192	12	366+174	21.5
1985	92	6.1	226+134	13.3
1986	77	9.6	296+219	17.4

Data: nflverse:draft_picks, nflverse:players, wikipedia:season-stats (CC-BY-SA, facts-only), nfl.com:official-stats (facts-only reference), nfl.com:official-stats (games-played, facts-only reference) · multi-source verified via the StatVault Oracle · updated 6/18/2026

Career Value · VORP

8 career value over replacement — #3724 all-time of 4,642. 2.7/season above a replacement-level RB.

Draft OutcomeSteal ↑

Pick #248 (Rd 9) · SFO · 1984 · +21.5 vs expected KV-H

44actual

22.5 expected · Δ+21.5

Fan Rating

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Compare Derrick Harmon vs Player Report data error

Derrick Harmon

Archetype Intelligence

Career Value · VORP

Combined Season Grid

Passing

Rushing

Receiving

Defense

KV-H Anatomy

All-Time Standing

Career Aging Trajectory

College Stats

Reference Graph

Top Teammates

1984 Draft Class· this player went #248

Franchise Succession

Similar Players

Movementderived from season history

Athletic & Unique Profile

Knox

Era Translator

Career Geography