Sebastian Joseph-Day is a career quality starter — a pass rusher whose body of work places Joseph-Day in the top half of all players at the position historically. The Knox model values sustained contribution over flash, and Joseph-Day's career arc reflects exactly that kind of reliable professional-grade performance.
Reached 8% 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: 92%.
Career Value · VORP
58 career value over replacement — #1884 all-time of 4,649. 8.3/season above a replacement-level DL.
Pick #195 (Rd 6) · LA · 2018 · +34.2 vs expected KV-H
Fan Rating
Rate Sebastian Joseph-Day — 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.
Production per snap — the box score normalized by opportunity. SIS is z-scored within interior d-line, shrinkage-regularized so small samples don't spike, over the NFL snap-count era (2012+).
Amber = this player (normalized to own peak). Indigo = average defensive linemen aging curve. Group peak age: 25. Source: StatVault KV-H era (1999+).
Defense
Snap Counts (2012–present)
Proprietary StatVault Metrics
College stats are not imported for this profile yet.
StatVault has the verified college attribution (Rutgers), 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.
Sebastian inherited the Los Angeles Chargers DL room from Jerry Tillery (2019–2022), and handed it to Morgan Fox (2022–2024).
Sebastian inherited the Tennessee Titans DL room from Arden Key (2023–2025), and holds it as the most recent the corpus records.
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.
Statistical + physical similarity across every player in the database, position-relevant (0–100%).
Last recorded season with TEN
Joined TEN (from LAC)
Joined LAC (from LAR)
Joined LAR (from LA)
Drafted by LA — Round 6, Pick 195
From nflverse weekly injury reports · coverage begins 2009.
| Season | Team | Games Out | Designations |
|---|---|---|---|
| 2023 | LAC | 0 | W9Questionable· Illness |
| 2022 | LAC | 0 | W7Questionable· AnkleW14Doubtful· KneeW15Questionable· Knee / Back |
| 2021 | LA | 2 | W8Out· ChestW9Out· Chest |
| 2020 | LA | 0 | W13Questionable· Hip |
StatVault's proprietary player intelligence, informed by full career data. How Knox works →
Era-normalized career quality — z-scored against 7-season peers. See all →
Career durability — games played vs. scheduled, across 7 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 |
|---|---|---|---|---|
| 2019 | 2 | 0.1 | 2 | 0.1 |
| 2020 | 1 | 0.1 | 1 | 0.1 |
| 2021 | 3 | 0.4 | 7+4 | 0.4 |
| 2022 | 2 | 0.1 | 2 | 0.1 |
| 2023 | 3 | 0.2 | 4+1 | 0.2 |
| 2024 | 2.5 | 0.1 | 3+0.5 | 0.2 |
| 2025 | 2 | 0.1 | 2 | 0.1 |
Data: nflverse:players, nflverse:player_stats_def, nflverse:snap_counts, nflverse:draft_picks, nflverse:injuries · multi-source verified via the StatVault Oracle · updated 7/31/2026
Arthur Jones
DT
90% match
2018 Draft ClassmatesFull class →
Wore 4 distinct franchise crests across 7 seasons (2019–2025) — a true nomad. The crest trail: