When certain head coaching positions become available, experts take a look at what specific up-and-coming individual would be a best fit for a specific situation.
This happens at both the collegiate and pro level.
These "experts" utilize a few different factors when drawing conclusions. One of the primary things they look at is the strength of the program in college and the popularity of the franchise in the NFL.
In short, no one expects someone like Nick Saban to take a job with Sacramento State. On the same note, I couldn't even envision a Bill Cowher putting all of his chips on the table for a franchise like the Carolina Panthers.
With that in mind, lets take a look at all the possible head coaching vacancies in the NFL and where they rank in terms of popularity for prospective candidates.