Chamberlain has been at the club for four seasons having previously worked for Fulham in the Premier League.

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For those who believe that silverware is a better metric than individual numbers, you may wish to consider that in eight full seasons at Old Trafford he helped United win four Premier League titles and a Champions League.

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The Brighton, Michigan, native played four seasons at Grand Valley State, which traditionally has one of the premier programs in Division II college football.

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But in successive seasons he guided a youthful side to top-four finishes in the Scottish Premier League, becoming the first manager to do so since Eddie Turnbull in the 1970s.

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Drogba scored 157 goals for Chelsea in his eight seasons at the club, winning three English Premier League titles, four FA Cups and two League Cups as well as the London club's long-awaited first European crown.

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