ESPN

The Bill & Bill Connections

Just how much have Parcells and Belichick influenced today's NFL? We mapped out how almost every NFL head coach can be traced back to the duo -- in the shortest path. Watch the ESPN 30 for 30 film "The Two Bills" on WatchESPN and the ESPN App.

By Luke Knox and Anthony Gulizia

Steve Wilks

ARI

Steve Wilks

Dan Quinn

ATL

Dan Quinn

John Harbaugh

BAL

John Harbaugh

Sean McDermott

BUF

Sean McDermott

Ron Rivera

CAR

Ron Rivera

Matt Nagy

CHI

Matt Nagy

Marvin Lewis

CIN

Marvin Lewis

Hue Jackson

CLE

Hue Jackson

Jason Garrett

DAL

Jason Garrett

Vance Joseph

DEN

Vance Joseph

Matt Patricia

DET

Matt Patricia

Mike McCarthy

GB

Mike McCarthy

Bill O'Brien

HOU

Bill O'Brien

Doug Marrone

JAC

Doug Marrone

Andy Reid

KC

Andy Reid

Anthony Lynn

LAC

Anthony Lynn

Sean McVay

LAR

Sean McVay

Adam Gase

MIA

Adam Gase

Mike Zimmer

MIN

Mike Zimmer

Sean Payton

NO

Sean Payton

Pat Shurmur

NYG

Pat Shurmur

Todd Bowles

NYJ

Todd Bowles

Jon Gruden

OAK

Jon Gruden

Doug Pederson

PHI

Doug Pederson

Mike Tomlin

PIT

Mike Tomlin

Pete Carroll

SEA

Pete Carroll

Kyle Shanahan

SF

Kyle Shanahan

Dirk Koetter

TB

Dirk Koetter

Mike Vrabel

TEN

Mike Vrabel

Jay Gruden

WSH

Jay Gruden