Senior defensive back for Boston College. 2021: 4 interceptions, 1 pass breakup, 15 tackles.
6′0″ · 179 lb · West Haven, CT
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 story
4 defensive back for Boston College. 2021: 4 interceptions, 1 pass breakup, 15 tackles.
The record fills in as he plays.
His career, year by yearBrandon Sebastian
Erases the deep middle of the field. Brandon Sebastian has been at Boston College through two head coaches in four seasons. In 2021 the league put his name on paper for the first time: ACC Defensive Back Player of the Week. The receipt: 3 tackles, 1 INT against Wake Forest — Week 13, 2021.
Low coverage — composed from the verified record.
How it ended
Four seasons at Boston College, 134 tackles — his college career is complete.
Career arc
Coaching lineage · 2018–2021
2 coachesCoaching transition mid-career: Steve Addazio → Jeff Hafley. Worth noting in scheme + development context.
Season context · Team result + system
Where this defender ranks vs the field
Box-score production percentiles vs the position cohort
Elite: interceptions (97th percentile). Concern: tackles for loss (7th percentile).
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 · Per-game
2021 season · 9 games
Home vs Road
| TKL/g | TFL/g | SACK/g | PD/g | |
|---|---|---|---|---|
| Home5g | 2.6 | 0.0 | 0.0 | 0.0 |
| Road4g | 0.5 | 0.0 | 0.0 | 0.2 |
First half vs Second half
| TKL/g | TFL/g | SACK/g | PD/g | |
|---|---|---|---|---|
| Weeks 1-76g | 1.8 | 0.0 | 0.0 | 0.2 |
| Weeks 8+3g | 1.3 | 0.0 | 0.0 | 0.0 |
Supporting cast · Scheme
Staff and system around the player
Head Coach
Bill O'Brien
Scheme reads (pass share, tempo, sack rate) need at least 3 team games — 2 games in so far.
Player standing · 2021
Tackle volume for the position at the early end of the ladder.
Recognition
Production · CFB Index Score
| Season | Team | |||||||
|---|---|---|---|---|---|---|---|---|
| 2021 | Boston College | 15 | 12 | 0.0 | 0.0 | 1 | 4 | -- |
| 2020 | Boston College | 25 | 18 | 2.0 | 0.0 | 10 | -- | -- |
| 2019 | Boston College | 45 | 33 | 0.0 | 0.0 | 9 | 1 | -- |
| 2018 | Boston College | 49 | 39 | 2.0 | 1.0 | 8 | 2 | -- |
| Career | 134 | 102 | 4.0 | 1.0 | 28 | 7 | -- |
SIGNATURE GAME · Week 4 · 2021
W 41–34
vs Missouri
6 SOLO · 7 TOT · 1 INT
Edged out Missouri at home in a shootout.
With D. Grosel — 175 yds · 2 TD · 1 INT · QBR 83.1 · 35 rush yds (9 car) · P. Garwo III — 175 rush yds (25 car) · 2 TD
Game log · Week-by-week
2021 season · 9 games
| Wk | Opp | TKL | SOLO | TFL | SACK | INT | PD | Note |
|---|---|---|---|---|---|---|---|---|
| Wk 1 | W 51-0vs Colgate | 1 | 1 | 0.0 | 0.0 | — | 0 | |
| Wk 2 | W 45-28@ Massachusetts | — | — | — | — | 1 | — | |
| Wk 3 | W 28-3@ Temple | 1 | 1 | 0.0 | 0.0 | — | 0 | |
| Wk 4 | W 41-34vs Missouri | 7 | 6 | 0.0 | 0.0 | 1 | 0 | Season-high 7 tackles |
| Wk 5 | L 13-19@ Clemson | 1 | 1 | 0.0 | 0.0 | — | 1 | |
| Wk 7 | L 7-33vs NC State | 1 | 0 | 0.0 | 0.0 | — | 0 | |
| Wk 8 | L 14-28@ Louisville | — | — | — | — | 1 | — | |
| Wk 12 | L 23-26vs Florida State | 1 | 1 | 0.0 | 0.0 | — | 0 | |
| Wk 13 | L 10-41vs Wake Forest | 3 | 2 | 0.0 | 0.0 | 1 | 0 | |
| Total | 15 | 12 | 0.0 | 0.0 | 4 | 1 |
Play style
Single-high range who erases the deep middle of the field.
CFB Index positional classification
Player DNA
Single-high range who erases the deep middle of the field.
His 2021 production profile sits closest to P.J. O'Brien’s 2021 season.
Matches P.J. on
Not enough data yet for this comparison.
As a senior, his production profile tracks closest to Cam Smith's senior season at Memphis (2022).
Matches Cam on
Player DNA