Since the year 2000, the Stamford Bridge managerial seat has been vacated 20 (TWENTY) times. Yes, some of those were caretakers; but of all the big clubs in the Premier League you would expect to commit to a long-term project that may not bear immediate fruit, Chelsea would be the least likely. For them, when it comes to managers, it has been more like a slapstick round of musical chairs than an epic game of thrones.