Matthew Griebel

HEAD_LINE_JUDGE · —head_line_judge · — · 37 games since 2022

Worked PSU 45–0 MRSH in week 1.

Games since '22Games since '22

2 in 20262 in 2026

Flags / g 2026Flags / g · 2026

11.5

— · LG 12.7— pctl · league 12.7

Acc. yds / gAcc. yds / g

LG 111League 111

Judgment shareJudgment share

56%

LG 60%League 60%

Home cookingHome cooking · raw

−1.8

Raw · under 8 GNo read under 8 games

Late whistleLate whistle

—

Under 8 gamesUnder 8 games

Game lengthGame length

3:15

LG 3:24League 3:24

Flag profile

Per game · | = league

False startP

2.4

HoldingJ

2.0

Pass interferenceJ

1.1

Personal foulJ

0.6

Unsportsmanlike conductJ

0.6

OffsideP

0.5

Delay of gameP

0.4

J = judgment · P = procedural · + 0.0 other / g · Career, 37 G

Leans

Flags over expected / g

Out-of-conference teams14 G · −0.6 to +0.6

+0.0noise

MAC teams3 G · raw, under 8 G

−0.4

American teams2 G · raw, under 8 G

+2.3

Western Michigan5 G · raw, under 8 G

+0.8

Penn State4 G · raw, under 8 G

+0.7

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

Crew history

37 games

Crew history
Year	Crew · position	G	Flags/g
2026	— · head_line_judge	2	11.5
2025	Big Ten · head_line_judge	7	9.7
2024	Big Ten · head_line_judge	9	6.9
2023	MAC · head_line_judge	10	11.8
2022	MAC · head_line_judge	9	10.3

Replay reviews

Since 2025 · 9 G

Reviews, 0.6/g

40%

Overturned · 2

≈0.0 h

Of replay

Catch / no catch

4 · 2 OT

Broke the plane

1 · 0 OT

Longest: ≈ 1:54, short of the goal line upheld · 2025 wk 9, UCLA at
Indiana

■ 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 10:08 AM ET

Source: school box scores · Updated Fri 10:08 AM ET