Game log · Week-by-week
2026 season · 3 games
| Wk | Opp | TKL | SOLO | TFL | SACK | INT | PD | Note |
|---|---|---|---|---|---|---|---|---|
| Wk 1 | W 37-27vs Hawai'i | 1 | 0 | 0.5 | 0.5 | — | 0 | |
| Wk 1 | L 6-45vs Miami | 4 | 2 | 0.0 | 0.0 | — | 0 | |
| Wk 3 | L 7-35@ Duke | 9 | 4 | 0.0 | 0.0 | — | 0 | Season-high 9 tackles |
| Total | 14 | 6 | 0.5 | 0.5 | — | 0 |
#10
Sam Mattingly
Junior linebacker for Stanford. 2026: 3 games with a box-score line.
6′2″ · 235 lb · Magnolia, TX · Magnolia West
CFB Index 14 · #556 of 583 LBsHigh confidence
CFB Index
A single number blending on-field production (an EPA-based value lane) with box-score output for this player's position.
0-100, scaled within each position's own cohort — not directly comparable across positions.
The numbers
14
tackles · 2026 · through week 3
3 games into 2026 so far -- Best game: 9 tackles, at Duke
His career numbers, season by seasonThe story
Junior linebacker for Stanford. 2026: 3 games with a box-score line.
- Signed as a 3-star recruit to Stanford in 2024.
Sam Mattingly
Ranges from hash to hash and makes his own tackles. Sam Mattingly has been at Stanford through three head coaches in three seasons. The receipt on tape: 9 tackles against Duke, Week 3, 2026.
14 TACKLES · 0.5 SACKS
Low coverage — composed from the verified record.
- season totals
- positional archetype classification
- head-coach lineage
- game log
His career
20244 games
- Signed with Stanford3-star out of Magnolia West
Career arc
HS
Recruit
★★★
CFB
College
Stanford
NFL
NFL Draft
—
Coaching lineage · 2024–2026
3 coaches2024
Troy Taylor
Stanford
2025era →
Frank Reich
Stanford
2026era →
Tavita Pritchard
Stanford
Played under 3 different head coaches: Troy Taylor, Frank Reich, and Tavita Pritchard. Multi-era developmental context.
Career stats
Game log
Game by game
Sam Mattingly's 2026 production
Point color shows the opponent's defensive strength that week (red = weaker defense, blue = stronger) — dashed line is this player's own season average.
Signature game
SIGNATURE GAME · Week 1 · 2026
W 37–27
vs Hawai'i
0.5 sacks · 0.5 tackles for loss · 1 tackles
With D. Warren — 310 yds · 1 TD · 0 INT · QBR 79.7 · 16 rush yds (5 car) · A. Flintoft — 43.2 yards per punt · 6 punts · 2 inside the 20
2026 snapshot
Since week 1: +9 tackles.
Season context · Team result + system
2024Stanford3-9HC: Troy Taylor · Run-leaning
2025Stanford4-8HC: Frank Reich · Balanced
2026Stanford1-2HC: Tavita Pritchard · Pass-leaning
Where this defender ranks vs the field
Box-score production percentiles vs the position cohort
High confidence
Concern: passes defended (28th percentile).
Box-score production (6)
Percentiles are versus same-position peers with enough snaps this season, based on box-score production. There are no play-by-play efficiency bars here: CFBD's play-value model credits offensive players only, so no defensive EPA exists to rank.
Splits & context
Splits · Per-game
2026 season · 3 games
Home vs Road
| TKL/g | TFL/g | SACK/g | PD/g | |
|---|---|---|---|---|
| Home2g | 2.5 | 0.2 | 0.2 | 0.0 |
| Road1g | 9.0 | 0.0 | 0.0 | 0.0 |
First half vs Second half
| TKL/g | TFL/g | SACK/g | PD/g | |
|---|---|---|---|---|
| Weeks 1-73g | 4.7 | 0.2 | 0.2 | 0.0 |
Supporting cast · Scheme
Staff and system around the player
Head Coach
Tavita Pritchard
Pass share
57.4%
112 pass / 83 run
Plays / game
65.0
3 games
Team sack rate
4.0%
126 dropbacks · PBP
Scheme: Pass-leaning.
Awards
Player standing · 2025
Rotational
Tackle volume for the position in rotation-piece range.
Recognition
Roster2-deepStarterRecognizedEliteApex
Production · CFB Index Score
14 · #556 of 583 LBs
Three-star recruit. Now #556 at the position.
2026 outlook
Outside shot for All-ACC
Based on 2025: #72 of 74 ACC LBs
How the All-ACC estimate is computed
15% estimated, 95% confidence interval 13–17%. Base rate measured from players who finished at a comparable rank in their conference and came back the next season. It is an estimate from a small sample, not a forecast of this player.
How he plays
Play style
Ranges from hash to hash and makes his own tackles.
CFB Index positional classification
Starter
The No. 1,034 recruit in the country is starting at linebacker in the ACC as a junior.
DNA match
Player DNA
Sideline-to-Sideline
Ranges from hash to hash and makes his own tackles.
LB
His 2025 production profile sits closest to Kieren Douglas’s 2022 season.
Matches Kieren on
TFL rate
PD rate
Weight
Not enough data yet for this comparison.
As a sophomore, his production profile tracks closest to Semisi Fakasiieiki's sophomore season at Purdue (2022).
Matches Semisi on
Height
Solo tackle rate
Weight
The linebacker corps · Stanford
- #35Matt Rose106 tackles · 2025
- Jahsiah Galvan50 tackles · 2025
- #11Tevarua Tafiti32 tackles · 2025
- #38Zach Johnson28 tackles · 2025
- #10Sam Mattingly23 tackles · 2025
16 more on the roster · Stanford team page
Stats from CFBD · ESPN · fan discourse. Every figure computed from source tables — not invented. Methodology