Who are all of the possible 3-4 Defensive Coordinator Candidates? I know there is rampant speculation that the Cowboys are moving to a 4-3; however, if that is incorrect, then I'm curious about the 3-4 candidates. Defensive Coordinator's for a teams that did NOT fire their Head Coach are probably not candidates because coaches can't make lateral moves unless their contract expired. Ray Horton - Reported to be Friends with Garrett. Lovie Smith Romeo Crennel Eric Mangini - Would probably want the same assistant coaches. Todd Grantham - Has worked for the Cowboys and Saban in the past. Someone already on the coaching staff ? .