The Arizona Cardinals lost their linebackers coach to a promotion, they are now losing their defensive line coach Derrick LeBlanc, by their own choice as they have parted ways with the veteran defensive line coach.
LeBlanc has been coaching defensive line for two decades, but had only three years NFL experience, one year as the Miami Dolphins assistant defensive line coach, then his two years with the Arizona Cardinals.
Judging LeBlanc would be nearly impossible, as he was hampered by injuries for both seasons, so you have to be impressed how much he got out of rotational players and street free agents.