LONDON — It is often said that no job in sports is less secure than that of an N.F.L. player. With no guaranteed contracts, incredible pressure for immediate results, a steady influx of new talent from college football and the constant threat of serious injury, it is hardly surprising that the average player’s career lasts about three years.
There is, however, a job in sports that makes the N.F.L.’s roster fluctuations seem downright stable: managing a Premier League team. In fact, those who are lucky enough to receive the privilege of coaching in the most popular soccer league in the world should try their best to avoid blinking, lest they miss the whole thing.