Kirk Mattson

HEAD_LINE_JUDGE · BIG 12head_line_judge · Big 12 · 43 games since 2022

Worked KSU 35–24 KU in week 7.

Games since '22Games since '22

6 in 20266 in 2026

Flags / g 2026Flags / g · 2026

11.2

— · LG 12.7— pctl · league 12.7

Acc. yds / gAcc. yds / g

101

LG 111League 111

Judgment shareJudgment share

61%

LG 60%League 60%

Home cookingHome cooking · raw

+1.0

Raw · under 8 GNo read under 8 games

Late whistleLate whistle

—

Under 8 gamesUnder 8 games

Game lengthGame length

3:30

LG 3:24League 3:24

Flag profile

Per game · | = league

HoldingJ

2.6

False startP

2.6

Pass interferenceJ

1.6

OffsideP

0.8

Delay of gameP

0.7

Unsportsmanlike conductJ

0.6

Face maskJ

0.5

J = judgment · P = procedural · + 0.1 other / g · Career, 41 G

Leans

Flags over expected / g

Non-Big 12 teams15 G · −0.8 to +0.4

−0.2noise

ACC teams4 G · raw, under 8 G

−1.1

bigsky teams4 G · raw, under 8 G

+0.3

Arizona7 G · raw, under 8 G

+1.5

Oregon5 G · raw, under 8 G

−0.7

0 LEANS IN 40 SPLITS · ~2 EXPECTED BY LUCK · + = OPPONENT FLAGGED MORE

Crew history

43 games

Crew history
Year	Crew · position	G	Flags/g
2026	Big 12 · head_line_judge	6	11.2
2025	Big 12 · head_line_judge	7	13.7
2024	Big 12 · head_line_judge	10	9.3
2023	Pac-12 · head_line_judge	10	13.3
2022	Pac-12 · head_line_judge	10	12.4

Replay reviews

Since 2025 · 13 G

Reviews, 1.3/g

53%

Overturned · 9

≈0.3 h

Of replay

Catch / no catch

5 · 2 OT

Fumble

4 · 2 OT

Broke the plane

4 · 1 OT

Unspecified

2 · 2 OT

Spot

1 · 1 OT

Targeting

1 · 1 OT

Longest: ≈ 5:31, runner broke the plane upheld · 2025 wk 13, Baylor at
Arizona

■ Overturned · review time = gap to next snap − game median

Flags / g = accepted penalties, games worked · Late whistle = 4th-q one-score judgment flags / play ÷ rest of game

Flags / g = accepted penalties · Home cooking = FOE on visitor − FOE on home, judgment flags only · Late whistle = 4th-q one-score judgment flags / play ÷ rest of game

Lean = pooled estimate whose 90% interval misses 0 with ≥ 8 G · shrunk toward 0 · judgment flags only · permutation luck check, 1,000 shuffles

Lean = pooled estimate whose 90% interval misses 0 with ≥ 8 G · shrunk toward 0 · luck check = 1,000 shuffles · source: school box scores · Updated Fri 10:07 AM ET

Source: school box scores · Updated Fri 10:07 AM ET