Reached 2% of the all-time Sacks 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: 88%.
Career Value · VORP
26 career value over replacement — #2816 all-time of 4,649. 2.9/season above a replacement-level LB.
Pick #143 (Rd 6) · STL · 1981 · +19.4 vs expected KV-H
Fan Rating
Rate Dave Ahrens — All-Time
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StatVault aggregates multiple open-licensed and proprietary sources into a single profile. The depth indicator above shows which layers are available for this player.
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.
Amber = this player (normalized to own peak). Indigo = average linebackers aging curve. Group peak age: 32. Source: StatVault KV-H era (1999+).
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Defense
Proprietary StatVault Metrics
College stats are not imported for this profile yet.
StatVault has the verified college attribution (Wisconsin), 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%).
Joined MIA (from DET)
Last recorded season with MIA
Joined DET (from IND)
Joined IND (from ARI)
Drafted by STL — Round 6, Pick 143
Joined ARI (from STL)
StatVault's proprietary player intelligence, informed by full career data. How Knox works →
Era-normalized career quality — z-scored against 9-season peers. See all →
Career durability — games played vs. scheduled, across 9 seasons.
Composite score across availability, IR frequency, and injury severity. See all →
Sacks 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 Sacks | Sacks/G | → 2025 Sacks | → 2025 /G |
|---|---|---|---|---|
| 1981 | 0 | 0 | 0 | 0 |
| 1982 | 0 | 0 | 1+1 | 0.1 |
| 1983 | 0 | 0 | 1+1 | 0.1 |
| 1984 | 0 | 0 | 1+1 | 0 |
| 1985 | 0 | 0 | 1+1 | 0 |
| 1986 | 2 | 0.1 | 1-1 | 0.1 |
| 1987 | 0 | 0 | 0 | 0 |
| 1988 | 0 | 0 | 0 | 0 |
| 1989 | 1 | 0.1 | 1 | 0 |
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 7/31/2026
Mark Herzlich
OLB
86% match
1981 Draft ClassmatesFull class →
Wore 4 distinct franchise crests across 9 seasons (1981–1989) — a true nomad. The crest trail: