Even if it's not Zimmer, McCarthy's long tenure in the league as a successful head coach and coordinator would provide an expansive network of potential candidates to fill out a quality support staff. It's just another feather in his cap especially when compared to the likes of Kafka, Moore, ect. Aspiring assistants want to know they'll be part of a successful program that gets to the playoffs more often than not, where they'll be put into the spotlight to enhance their own profile.