Mark Walker

UMPIRE · SUN BELTumpire · Sun Belt · 32 games since 2024

Worked APP 34–31 JMU in week 8.

Games since '24Games since '24

9 in 20269 in 2026

Flags / g 2026Flags / g · 2026

11.6

— · LG 12.7— pctl · league 12.7

Acc. yds / gAcc. yds / g

102

LG 111League 111

Judgment shareJudgment share

64%

LG 60%League 60%

Home cookingHome cooking · pooled

−0.0

−1.8–+1.8−1.8 to +1.8 · noise

Late whistleLate whistle

—

Few late playsToo few late plays

Game lengthGame length

3:22

LG 3:24League 3:24

Flag profile

Per game · | = league

HoldingJ

2.1

False startP

2.0

OffsideP

0.9

Personal foulJ

0.9

Pass interferenceJ

0.8

Delay of gameP

0.4

Face maskJ

0.4

J = judgment · P = procedural · + 0.0 other / g · Career, 32 G

Leans

Flags over expected / g

Non-Sun Belt teams12 G · −1.1 to +0.1

−0.5noise

southland teams3 G · raw, under 8 G

−0.5

American teams2 G · raw, under 8 G

−0.9

UL Monroe7 G · raw, under 8 G

+0.9

Louisiana5 G · raw, under 8 G

−1.7

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

Crew history

32 games

Crew history
Year	Crew · position	G	Flags/g
2026	Sun Belt · umpire	9	11.6
2025	Sun Belt · umpire	12	11.0
2024	Sun Belt · umpire	11	7.2

Replay reviews

Since 2025 · 21 G

Reviews, 0.5/g

50%

Overturned · 5

≈0.2 h

Of replay

Catch / no catch

6 · 3 OT

Spot

3 · 2 OT

Broke the plane

1 · 0 OT

Longest: ≈ 2:24, incomplete pass upheld · 2026 wk 8, James Madison at
App State

■ 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