Bill O'Brien compiled a career record of 52–48 as an NFL coach. Bill O'Brien learned the game under Bill Belichick, Chan Gailey, Nick Saban. The Bill O'Brien coaching tree includes Anthony Midget, Brian Johnson, Evan Rothstein, Keenan McCardell, Matt Applebaum, and 3 more.
Mentors: Bill Belichick, Chan Gailey, Nick Saban
Coaching tree: Anthony Midget, Brian Johnson, Evan Rothstein, Keenan McCardell, Matt Applebaum, Mike Adams, Thad Lewis, Will Lawing