Found this portion of an article on head coaching candidates on ESPN.
The pool of available candidates will grow once teams fire their current head coaches, possibly affecting the dynamic. But of the currently available candidates who have not yet been NFL head coaches, nine came up in conversation with league insiders most consistently: college coaches Bill O'Brien (Penn State) and James Franklin (Vanderbilt); NFL offensive coordinators Jay Gruden (Cincinnati), Darrell Bevell (Seattle) and Greg Roman (San Francisco); and NFL defensive coordinators Sean McDermott (Carolina), Todd Bowles (Arizona), Ray Horton (Cleveland) and Mike Zimmer (Cincinnati).
In Carolina, McDermott has benefited from arguably the NFL's best front seven. But the Panthers' secondary fell apart through injuries, and the defense has succeeded in a difficult environment. The feeling among some in the league was that head coach Ron Rivera could be entering his final season. The team hired from within when filling vacancies on the staff, which can be a good thing, or possibly consistent with a team anticipating turnover. Those uncertain feelings intensified when Carolina lost three of its first four games.
McDermott's defense ranks among the top seven in all the categories listed above in relation to Bowles' defense in Arizona. McDermott has never interviewed for a head coaching job, but that could change this offseason. "I hear Sean McDermott's name quite a bit," one exec said. An agent thought McDermott would attract interest, but might be a year away from landing a top job.