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QBPIThistorical

Bobby Layne

★ HALL OF FAME

BornDec 19, 1926

Age99

CollegeTexas See College Stats

Rookie yr1948

All-Time Standing

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

Depth

of 100

Reached 28% of the all-time Passing Touchdowns leader — a rotational/depth all-time profile at the position.

28% of the all-time Passing Touchdowns leader28

2 categories ≥25% of the all-time leader67

A 0–100 scale where 100 = matched the all-time leader at 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: 0%.

Encyclopedia Coverage

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Compare Bobby Layne 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.

Where this data comes from

Modern-era stats (1999+) come from nflverse's open data releases. Pre-1999 seasons are backfilled additively from Wikipedia and NFL.com's own official season pages — never from rights-restricted sources.

nflverse — CC-BY 4.0 — attribution required
Wikipedia — Facts extracted under Feist v. Rural Telephone; courtesy CC-BY-SA attribution
NFL.com — Official league site; facts extracted under Feist, courtesy attribution

Methodology · Trust Center

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.

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.

Franchise Succession

the room, before and after

Bobby opened the Detroit Lions QB lineage the corpus knows, and handed it to Gary Danielson (1977–1984).

Bobby Layne 1950–1958Gary Danielson 1977–1984Eric Hipple 1981–1989Rodney Peete 1989–1993Scott Mitchell 1994–1998Joey Harrington 2002–2005Matthew Stafford 2009–2020Jared Goff 2021–2026

Bobby opened the Pittsburgh Steelers QB lineage the corpus knows, and handed it to Terry Bradshaw (1970–1983).

Bobby Layne 1958–1962Terry Bradshaw 1970–1983Mark Malone 1980–1987Bubby Brister 1986–1992Neil O'Donnell 1991–1995Kordell Stewart 1995–2002Ben Roethlisberger 2004–2021

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.