The 2014-15 season saw Chelsea win the top level of English soccer, led by manager Jose Mourinho. Now, the man who led them there won't even see 2016 as Chelsea sit at 15 points, only good for 16th place in the league, and 1 point off of a relegation spot.
What's the cause of his firing? Obviously the poor play by the squad, capped off with their last match ending in a 2-1 loss at Leicester City. However, we can probably trace everything back to a July friendly in New Jersey.