McClaren was a member of Harry Redknapp's staff at QPR before he left and failed to get Derby promoted twice (and was then sacked by the Rams before now being dismissed by Newcastle).
Interestingly, many QPR fans would like McClaren back. Not as manager, of course, but in a role he seemingly does best - being one of the manager's coaches.
Others, though, would have been more scared had David Moyes got the job.
On a day when plenty of Newcastle and Derby fans were talking, then, here's what both QPR and Sunderland fans also had to say about McClaren (and Benitez) on Twitter:
Steve McClaren for QPR back room staff— Luke Phelps (@PhelpsLuke) March 11, 2016
How long before QPR fans start calling for McClaren after a couple of defeats? I'll give it a month #QPR— Sean Gallagher (@seangallagher9) March 11, 2016
Benitez - tactician; motivator; disciplinarian; experienced.....didn't know he was a HEART SURGEON as well!!! #safc— Paul Footes (@FootsySAFC) March 11, 2016
Don't know how I feel about them getting Benitez. I think I'd have been more concerned if they got Moyes or Rodgers. #safc— Jamie De Cruz (@J_De_Cruz) March 11, 2016