Cory Undlin

Assistant

Team: HOUType: DefensiveTenure: 3 years (2023-2026)

Coaching Timeline

Why does coaching matter?

CFB

California Lutheran

Linebackers

1998-992 yrs

CFB

California Lutheran

Defensive Coordinator

2000-012 yrs

CFB

Fresno State

Graduate Assistant

2002-032 yrs

New England Patriots

Defensive Assistant

20041 yr

Cleveland Browns

Defensive Quality Control

2005-062 yrs

Cleveland Browns

Asst. Special Teams

20071 yr

Cleveland Browns

Defensive Backs

20081 yr

Jacksonville Jaguars

Defensive Assistant

20091 yr

Jacksonville Jaguars

Defensive Backs

2010-112 yrs

Denver Broncos

Defensive Quality Control

20121 yr

Denver Broncos

Defensive Backs

2013-142 yrs

Philadelphia Eagles

Defensive Backs

2015-195 yrs

Detroit Lions

Defensive Coordinator

20201 yr

San Francisco 49ers

Other Notable Asst.

20211 yr

San Francisco 49ers

Def. Passing Game Specialist

20221 yr

Houston Texans

Def. Passing Game Coordinator

2023-253 yrs

Team Info

Season	Role	Team	Record	HC	OC	DC	QB1	QB2	RB1	WR/TE 1	WR/TE 2
2025	Other Notable Asst.	HOU	12-5	DeMeco Ryans	Nick Caley	Matt Burke	C.J. Stroud(13.00)	Davis Mills(4.50)	Woody Marks(14.75)	Nico Collins(15.00)	Dalton Schultz(16.50)
2024	Other Notable Asst.	HOU	10-7	DeMeco Ryans	Bobby Slowik	Matt Burke	C.J. Stroud(16.25)	—	Joe Mixon(13.25)	Nico Collins(10.50)	Tank Dell(13.75)
2023	Other Notable Asst.	HOU	10-7	DeMeco Ryans	Bobby Slowik	Matt Burke	C.J. Stroud(15.00)	Davis Mills(1.75)	Devin Singletary(16.75)	Nico Collins(14.25)	Tank Dell(9.75)
2022	Other Notable Asst.	SF	13-4	Kyle Shanahan	—	DeMeco Ryans	Jimmy Garoppolo(10.25)	Brock Purdy(6.25)	Christian McCaffrey(16.75)	Brandon Aiyuk(16.75)	George Kittle(14.75)
2021	Other Notable Asst.	SF	10-7	Kyle Shanahan	Mike McDaniel	DeMeco Ryans	Jimmy Garoppolo(13.50)	Trey Lance(3.75)	Elijah Mitchell(11.00)	Deebo Samuel Sr.(15.75)	George Kittle(13.75)

Coach Impact

Percentiles

Detroit Lions (2020)

Defensive Coordinator

	Before (2019)	First Year (2020)	Delta
DEFENSE
EPA	0.071¹⁶	0.197⁰	▲ +0.126⁶
Succ%	44.4%³⁸	51.2%⁰	▲ +6.8%²
RZ P/V	5.1⁵⁰	5.8³	▲ +0.7¹⁰
3&Out%	28.0%²⁶	20.0%⁰	▼ -8.0%⁹
TO Rate	1.5%¹⁸	1.1%⁵	▼ -0.4%²⁶
Pass EPA	0.166¹⁰	0.304⁰	▲ +0.138¹²
Rush EPA	-0.098⁶⁸	0.058¹	▲ +0.156²
YAC OEX	0.56³⁴	0.79¹¹	▲ +0.22²⁸
xRY	4.41¹²	4.25²⁵	▼ -0.16⁷¹
RYOE	-0.39⁹⁴	0.56¹⁸	▲ +0.95²

Houston Texans (2023–2025)

Def. Passing Game Coordinator

	Before (2022)	First Year (2023)	Delta
OFFENSE
EPA	-0.166²	-0.033³⁶	▲ +0.133⁹²
Succ%	36.9%¹	40.9%²⁵	▲ +4.0%⁸⁴
RZ P/V	4.5⁸	5.3⁶⁹	▲ +0.8⁹³
Scripted EPA	-0.193⁴	-0.130¹²	▲ +0.063⁶⁵
3&Out%	40.5%⁴	30.9%⁵⁰	▼ -9.6%⁹⁵
TO Rate	2.7%⁹	1.3%⁹¹	▼ -1.4%⁹⁶
Pass EPA	-0.146³	0.049⁵²	▲ +0.195⁹³
Rush EPA	-0.169⁸	-0.161⁸	▲ +0.008⁵¹
YAC OEX	-0.25⁵	0.99⁹⁰	▲ +1.24⁹⁸
xRY	4.09⁶⁰	3.66²⁴	▼ -0.43⁶
RYOE	-0.02²⁴	-0.01²⁵	▲ +0.02⁵¹

Core Efficiency - Defensive

PercentilesGraph

Pass/Rush Splits - Defensive

PercentilesGraph

Year	Role	Team	% Pass	Pass EPA	Pass Succ%	Pass SOS	xYAC OEX	YAC OEX	% RB Rush	Rush EPA	Rush Succ%	Rush SOS	xRY	RYOE	% QB Rush	QB Rush EPA
2020	Defensive Coordinator	DET	56.4%	0.304	54.5%	0.032	-0.01	0.79	40.3%	0.058	46.7%	0.018	4.25	0.56	3.3%	0.322

Season

Role

Team

Record

QB1

QB2

RB1

WR/TE 1

WR/TE 2

2025

Other Notable Asst.

12-5

C.J. Stroud(13.00)

Davis Mills(4.50)

Woody Marks(14.75)

Nico Collins(15.00)

Dalton Schultz(16.50)

2024

Other Notable Asst.

10-7

C.J. Stroud(16.25)

—

Joe Mixon(13.25)

Nico Collins(10.50)

Tank Dell(13.75)

2023

Other Notable Asst.

10-7

C.J. Stroud(15.00)

Davis Mills(1.75)

Devin Singletary(16.75)

Nico Collins(14.25)

Tank Dell(9.75)

2022

Other Notable Asst.

13-4

Kyle Shanahan

—

DeMeco Ryans

Jimmy Garoppolo(10.25)

Brock Purdy(6.25)

Christian McCaffrey(16.75)

Brandon Aiyuk(16.75)

George Kittle(14.75)

2021

Other Notable Asst.

10-7

Kyle Shanahan

Mike McDaniel

DeMeco Ryans

Jimmy Garoppolo(13.50)

Trey Lance(3.75)

Elijah Mitchell(11.00)

Deebo Samuel Sr.(15.75)

George Kittle(13.75)

	Before (2019)	First Year (2020)	Delta
DEFENSE
EPA	0.071¹⁶	0.197⁰	▲ +0.126⁶
Succ%	44.4%³⁸	51.2%⁰	▲ +6.8%²
RZ P/V	5.1⁵⁰	5.8³	▲ +0.7¹⁰
3&Out%	28.0%²⁶	20.0%⁰	▼ -8.0%⁹
TO Rate	1.5%¹⁸	1.1%⁵	▼ -0.4%²⁶
Pass EPA	0.166¹⁰	0.304⁰	▲ +0.138¹²
Rush EPA	-0.098⁶⁸	0.058¹	▲ +0.156²
YAC OEX	0.56³⁴	0.79¹¹	▲ +0.22²⁸
xRY	4.41¹²	4.25²⁵	▼ -0.16⁷¹
RYOE	-0.39⁹⁴	0.56¹⁸	▲ +0.95²

Before (2019)

First Year (2020)

Delta

DEFENSE

EPA

0.071¹⁶

0.197⁰

▲ +0.126⁶

Succ%

44.4%³⁸

51.2%⁰

▲ +6.8%²

RZ P/V

5.1⁵⁰

5.8³

▲ +0.7¹⁰

3&Out%

28.0%²⁶

20.0%⁰

▼ -8.0%⁹

TO Rate

1.5%¹⁸

1.1%⁵

▼ -0.4%²⁶

Pass EPA

0.166¹⁰

0.304⁰

▲ +0.138¹²

Rush EPA

-0.098⁶⁸

0.058¹

▲ +0.156²

YAC OEX

0.56³⁴

0.79¹¹

▲ +0.22²⁸

xRY

4.41¹²

4.25²⁵

▼ -0.16⁷¹

RYOE

-0.39⁹⁴

0.56¹⁸

▲ +0.95²

	Before (2022)	First Year (2023)	Delta
OFFENSE
EPA	-0.166²	-0.033³⁶	▲ +0.133⁹²
Succ%	36.9%¹	40.9%²⁵	▲ +4.0%⁸⁴
RZ P/V	4.5⁸	5.3⁶⁹	▲ +0.8⁹³
Scripted EPA	-0.193⁴	-0.130¹²	▲ +0.063⁶⁵
3&Out%	40.5%⁴	30.9%⁵⁰	▼ -9.6%⁹⁵
TO Rate	2.7%⁹	1.3%⁹¹	▼ -1.4%⁹⁶
Pass EPA	-0.146³	0.049⁵²	▲ +0.195⁹³
Rush EPA	-0.169⁸	-0.161⁸	▲ +0.008⁵¹
YAC OEX	-0.25⁵	0.99⁹⁰	▲ +1.24⁹⁸
xRY	4.09⁶⁰	3.66²⁴	▼ -0.43⁶
RYOE	-0.02²⁴	-0.01²⁵	▲ +0.02⁵¹

Before (2022)

First Year (2023)

Delta

OFFENSE

EPA

-0.166²

-0.033³⁶

▲ +0.133⁹²

Succ%

36.9%¹

40.9%²⁵

▲ +4.0%⁸⁴

RZ P/V

4.5⁸

5.3⁶⁹

▲ +0.8⁹³

Scripted EPA

-0.193⁴

-0.130¹²

▲ +0.063⁶⁵

3&Out%

40.5%⁴

30.9%⁵⁰

▼ -9.6%⁹⁵

TO Rate

2.7%⁹

1.3%⁹¹

▼ -1.4%⁹⁶

Pass EPA

-0.146³

0.049⁵²

▲ +0.195⁹³

Rush EPA

-0.169⁸

-0.161⁸

▲ +0.008⁵¹

YAC OEX

-0.25⁵

0.99⁹⁰

▲ +1.24⁹⁸

xRY

4.09⁶⁰

3.66²⁴

▼ -0.43⁶

RYOE

-0.02²⁴

-0.01²⁵

▲ +0.02⁵¹

Year

Role

Team

% Pass

Pass EPA

Pass Succ%

Pass SOS

xYAC OEX

YAC OEX

% RB Rush

Rush EPA

Rush Succ%

Rush SOS

xRY

RYOE

% QB Rush

QB Rush EPA

2020

Defensive Coordinator

DET

56.4%

0.304

54.5%

0.032

-0.01

0.79

40.3%

0.058

46.7%

0.018

4.25

0.56

3.3%

0.322