Bill Callahan compiled a career record of 18–25 as an NFL coach. Bill Callahan learned the game under Bob Quinn, Brian Callahan, Brian Daboll. The Bill Callahan coaching tree includes Kevin Carberry, Wes Phillips, Zac Taylor.
Mentors: Bob Quinn, Brian Callahan, Brian Daboll, Dwayne Ledford, Kevin Stefanski, Raheem Morris, Robert Saleh, Tommy Rees, Zac Robinson
Coaching tree: Kevin Carberry, Wes Phillips, Zac Taylor