Stan Humphries is a career quality starter — a quarterback whose body of work places Humphries in the top quarter of all players at the position historically. The Knox model values sustained contribution over flash, and Humphries's career arc reflects exactly that kind of reliable professional-grade performance.

QBSD#12RES

Stan Humphries

Top 14% all-time QBsIron Man

Height6'2"

Weight223 lb

BornApr 14, 1965

Age61

CollegeLouisiana-Monroe; LSU See College Stats

Rookie yr1989

Draft

All-Time Standing

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

Depth

of 100

Reached 19% of the all-time Passing Yards leader — a rotational/depth all-time profile at the position.

19% of the all-time Passing Yards leader19

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: 89%.

Encyclopedia Coverage

Career Value · VORP

148 career value over replacement — #646 all-time of 4,649. 21.1/season above a replacement-level QB.

Draft OutcomeSteal ↑

Pick #159 (Rd 6) · WAS · 1988 · +35.4 vs expected KV-H

62actual

26.6 expected · Δ+35.4

💔+22.7 stolen VORP·1.08 szns lost

Fan Rating

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Compare Stan Humphries vs Player Report data error

StatVault aggregates multiple open-licensed and proprietary sources into a single profile. The depth indicator above shows which layers are available for this player.

Bio & DraftBirth date, height/weight, draft round/pick, college — sourced from nflverse players.csv (CC-BY 4.0). Covers all NFL eras.

Season Stats (1999–present)Week-by-week box scores aggregated to season totals: passing, rushing, receiving, defense. Source: nflverse player_stats. Counting stats are exact; rates are derived.

Advanced (EPA, 1999–present)Not available for this player

Snap Counts (2012–present)Not available for this player

Defensive StatsNot available for this player

College StatsCollege attribution is present, but this profile artifact does not yet carry a parsed college stat table.

NFL Combine / Pro DayNot available for this player

Proprietary LayersKV-H (Knox Value-Historical) — era-normalized career rating 0–100 calibrated within position group (1999+ coverage). SIS (Snap Impact Score, 2012+) — per-snap production z-scored within position. VORP — value over replacement player. Durability IQ — games-played percentile adjusted for era.

Pre-1999 players have bio + draft data but counting stats are not available from any freely-licensed source. Players with ★ Career Only see verified career aggregates from nflverse draft_picks.

Career Aging Trajectory

vs. position group average · KV-H basis

Amber = this player (normalized to own peak). Indigo = average QBs aging curve. Group peak age: 24. Source: StatVault KV-H era (1999+).

Career Milestones5

Major career thresholds crossed, derived from regular-season totals (1999+).

19901K career passing yards
19935K career passing yards
199325 career passing TDs
199510K career passing yards
199550 career passing TDs

Understanding These Stats

Passing

Cmp / Att — Completions and pass attempts.

Cmp% — Completion percentage — completions ÷ attempts × 100.

Yds — Passing yards — total air + yards after catch on completions.

TD / TD% — Passing touchdowns. TD% = TDs per 100 attempts, measuring scoring efficiency.

Int / Int% — Interceptions thrown. Int% = INTs per 100 attempts — the primary ball-security metric.

Y/A — Yards per attempt — passing yards ÷ attempts. The core passing efficiency rate.

AdjY/A — Adjusted yards per attempt: (Pass Yds + 20×TD − 45×INT) ÷ Att. Penalizes turnovers and rewards touchdowns — widely considered the most predictive single-season QB metric.

TD:INT — TD-to-interception ratio — passing touchdowns ÷ interceptions thrown. Elite QBs sustain career ratios above 3.0; HOF greats often exceed 4.0. Not shown when no interceptions.

Rate — NFL passer rating — the official formula combining Cmp%, Y/A, TD%, and INT% on a 0–158.3 scale. Good QB performance ≈ 90+; elite ≈ 110+.

Sk — Times sacked — how many times the QB was brought down behind the line of scrimmage.

Rushing

Att — Rushing attempts (carries).

Yds — Rushing yards.

TD — Rushing touchdowns.

Y/A — Yards per carry — rushing yards ÷ carries. The core rushing efficiency rate; 4.5+ is solid, 5+ is elite.

TD% — Touchdown rate per carry (TDs ÷ carries × 100) — measures scoring efficiency per touch independent of volume. Red-zone workhorses lead here.

1D — First downs gained on rushing plays.

1D% — First-down conversion rate (first downs ÷ carries × 100) — how often a carry moves the chains. Top RBs convert on 25%+ of attempts.

Fmb — Rushing fumbles lost — the key ball-security stat for running backs. Below 1 per season is elite.

Receiving

Tgt — Targets — how many times the receiver was thrown to, regardless of completion.

Rec — Receptions — catches made.

Yds — Receiving yards.

TD — Receiving touchdowns.

Ctch% — Catch rate — receptions ÷ targets × 100. Measures how reliably a receiver turns opportunities into gains. 70%+ is elite.

Y/R — Yards per reception — receiving yards ÷ receptions. Measures big-play ability; 15+ is elite for WRs.

Y/Tgt — Yards per target — receiving yards ÷ targets. The single most complete receiving efficiency metric: accounts for both drops and incomplete targets. Elite receivers post 8+ yards per target.

AirYd/T — Air yards per target — average depth of route at time of target. High values indicate a deep threat role; low values indicate a slot/check-down role.

1D — First downs gained on receiving plays.

Proprietary StatVault Metrics

KV-H (Knox Value-Historical) — Era-normalized career rating 0–100 within position group, calibrated so a 50 = average starter and 90+ = all-time great. Covers 1999–present. Built on a 5-year IQR/robust-std era window.

SIS (Snap Impact Score) — Per-snap production z-scored within position group and era (2012+). Measures how much a player produced per opportunity, not raw volume.

VORP (Value Over Replacement) — Sum of max(0, season KV-H − positional replacement level) across a career. Measures career value above the minimum-roster baseline at each position.

Durability IQ — 0–100 score reflecting how many games a player played relative to peers at the same position in the same era. Adjusts for injury-shortened seasons.

College Stats

Louisiana-Monroe; LSUCollege listed; stat table pending import

College stats are not imported for this profile yet.

StatVault has the verified college attribution (Louisiana-Monroe; LSU), 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.

Franchise Succession

the room, before and after

Stan inherited the Los Angeles Chargers QB room from Ed Luther (1980–1984), and handed it to Drew Brees (2001–2005).

Ed Luther 1980–1984Stan Humphries 1992–1997Drew Brees 2001–2005Philip Rivers 2004–2019Justin Herbert 2020–2025

The room is reconstructed from arrival order among durable members (≥4 seasons with the club) at the player’s position group — a lineage by arrival, not a week-by-week depth chart. Distinct from the league-wide positional GOAT torch.

Movementderived from season history

1997final season
Last recorded season with SD
1992team change
Joined SD (from WAS)
1988draft
Drafted by WAS — Round 6, Pick 159

Athletic & Unique Profile

verified measurements and curated source-tagged facts

6'2" / 223 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 7-season peers. See all →

peak 66

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

C1990

B1992

C+1993

B1994

B1995

B1996

C1997

Availability

Career durability — games played vs. scheduled, across 8 seasons.

82%

19891997

1989 · backup · 2/16 G1990 · backup · 7/16 G

1997 · cause not documented · 50%

Durability IQ

Composite score across availability, IR frequency, and injury severity. See all →

Durable

Era Translator

Pass 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 Pass Yds	Pass Yds/G	→ 2025 Pass Yds	→ 2025 /G
1990	1,015	145	3,545+2,530	208.5
1992	3,356	209.8	4,073+717	239.6
1993	1,981	165.1	3,680+1,699	216.5
1994	3,209	213.9	4,058+849	238.7
1995	3,381	225.4	4,147+766	243.9
1996	2,670	205.4	3,912+1,242	230.1
1997	1,488	186	3,683+2,195	216.6

Data: nflverse:draft_picks, nflverse:players, wikipedia:season-stats (CC-BY-SA, facts-only), nfl.com:official-stats (facts-only reference), espn.com:stats-api (games-played, facts-only reference) · multi-source verified via the StatVault Oracle · updated 7/31/2026