Usage Score
27.4
Player Dossier
2016-2020Stanford
K.J. Costello
QB • 6'5" • 225 lbs • Coto De Caza, CA, USA
Balanced quarterback profileVolume operator
K.J. Costello is a balanced quarterback profile with 27.4 usage in the latest tracked season.
Efficiency
39.5
Consistency
41.3
Season Value
35.9
Career Arc
Value trend by season
Best season by value score: 2018 Postseason · Stanford
16171718181920
Snapshot
- Career Teams
- 2
- Seasons Tracked
- 7
- Program Path
- Stanford • Mississippi State
- Peak Game
- Peak game by takeover score: Arizona State
Scouting Read
Best season and peak-game context are pinned here so the rest of the page can stay analytical without losing the headline story.
K.J. Costello, QB. Best season Best season by value score: 2018 Postseason · Stanford. K.J. Costello is a balanced quarterback profile with 27.4 usage in the latest tracked season.
Player insights
Lead takeaway
Best season by value score: 2018 Postseason
Stanford paired 3,499 primary output with 62.2 efficiency.
Supporting note
2020 Regular Season role shape
pass-led usage with 39.5 efficiency.
Supporting note
Career value cooled off
2020 Regular Season fell back from the prior stop by season value score.
Supporting note
Multi-stop career journey
Production spans 2 team stops, with role shifts visible across Stanford, Mississippi State.
Supporting note
Peak game by takeover score: LSU
Win shaped by high passing volume and turnover pressure. It landed in the 100th percentile of the selected season.
Analysis workspace
Season Workbench
Filter the strongest season sample, inspect game-level shape, and then drop into the full log without losing the story of the year.
Season Explorer
Understand the selected season before dropping into the full game log.
2020 Regular Season · Mississippi State
Games
6
Primary Metric / G
203
Efficiency
39.5
Usage
27.4
Consistency
41.3
Best Game by takeover score
Missouri
Hover a point or expand a game row to keep the active game context visible here.
Game-by-Game Trend
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Chronological game order.
Game by game trend chart. LSU: 585. Arkansas: 317. Kentucky: 228. Texas A&M: 72. Alabama: 16. Missouri: 0
Volume vs Efficiency
Low volume / high quality
High volume / high quality
Low volume / lower quality
High volume / lower quality
Volume on the x-axis, quality on the y-axis.
Volume versus efficiency scatter chart. LSU: 65 by 58.3. Arkansas: 63 by 51.7. Kentucky: 59 by 42.9. Texas A&M: 31 by 46.9. Alabama: 13 by 37.1. Missouri: 2 by 0
Split Comparison
Wins292.5 · n=2 · +134.3 vs Losses
Losses158.3 · n=4 · -134.3 vs Wins
First Half376.7 · n=3 · +347.3 vs Second Half
Second Half29.3 · n=3 · -347.3 vs First Half
Game Log
Dense stat lines with inline explanations and season-linked highlights.
6 games
Featured metric
Total Offense
Top game by takeover score
LSU
Best efficiency game
58.3 vs LSU
| Result | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sat 12/19 | vs Missouri | W 51-32 | 0 | 2 | 0 | 0.0 | 0 | 1 | 0 | — | — | — | — | — |
| Sat 10/31 | @ Alabama | L 0-41 | 4 | 11 | 16 | 36.4 | 0 | 0 | 37.1 | 2 | 0 | -4 | 0 | 4 |
| Sat 10/17 | vs Texas A&M | L 14-28 | 15 | 22 | 99 | 68.2 | 0 | 1 | 46.9 | 9 | -27 | -3 | 0 | 7 |
| Sat 10/10 | @ Kentucky | L 2-24 | 36 | 55 | 232 | 65.5 | 0 | 4 | 42.9 | 4 | -4 | -1 | 0 | 5 |
| Sat 10/3 | vs Arkansas300-yard game | L 14-21 | 43 | 59 | 313 | 72.9 | 1 | 3 | 51.7 | 4 | 4 | 1 | 0 | 7 |
| Sat 9/26 | @ LSU300-yard game · 3+ TD | W 44-34 | 36 | 60 | 623 | 60.0 | 5 | 2 | 58.3 | 5 | -38 | -7.60 | 0 | 0 |
Career Arc
Track team changes, role shifts, and season-to-season movement.
- 1
Stanford
2016-2019
Opening stop
- 2
Mississippi State
2020
Final stop
Season Progression
2016201720172018201820192020
| Season | Team | Primary | Efficiency | Usage | Delta |
|---|---|---|---|---|---|
| 2016 Regular Season | Stanford | 0 | — | — | — |
| 2017 Postseason | Stanford | 1,665 | 66.2 | 8.5 | 1,665 |
| 2017 Regular Season | Stanford | 1,665 | 66.2 | 8.5 | 0 |
| 2018 Postseason | Stanford | 3,499 | 62.2 | 11.2 | 1,834 |
| 2018 Regular Season | Stanford | 3,499 | 62.2 | 11.2 | 0 |
| 2019 Regular Season | Stanford | 1,052 | 63.1 | 11.6 | -2,447 |
| 2020 Regular Season | Mississippi State | 1,218 | 39.5 | 27.4 | 166 |
Signature Performances
Top Games
#1 Featured game
Arizona State
Win with 173 yards of offense and 74.2 efficiency.
173
Primary metric
173 total offense with 74.2 efficiency.
#2
LSU
585
Primary metric
Win shaped by high passing volume and turnover pressure.
585 total offense with 58.3 efficiency.
#3
Oregon State
387
Primary metric
Win with 387 yards of offense and 86 efficiency.
387 total offense with 86 efficiency.
#4
Arizona
326
Primary metric
Win with 326 yards of offense and 82.6 efficiency.
326 total offense with 82.6 efficiency.
#5
Washington
237
Primary metric
Win with 237 yards of offense and 69.1 efficiency.
237 total offense with 69.1 efficiency.
Top Seasons
#1 Season by value score
2018 Postseason · Stanford
3,499 primary output · 62.2 efficiency · 11.2 usage
63.1
#2
2018 Regular Season · Stanford
63.1
3,499 primary · 62.2 efficiency · 11.2 usage
#3
2017 Postseason · Stanford
49.7
1,665 primary · 66.2 efficiency · 8.5 usage
Milestones
11
250+ passing yards
10
300+ total offense
1
3+ takeover TD games
17
Above avg efficiency
Bio, Recruit, and Data Context
Recruit Profile
4★
Class 2016 · Rating 0.9749
Santa Margarita Catholic · Rancho Santa Margarita, CA
- Committed To
- Stanford
- Commit Date
- Jan 1, 2016
Career Facts
2
Career teams
7
Seasons tracked
7,434
Career Total Offense
Data Context
Coverage spans 7 tracked seasons, 35 games, and base opponent context only. Derived metrics fall back to raw production when share or rating context is missing.