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Andre Villas-Boas: C-
Andre Villas-Boas was supposed to be the foundation of the beginning of a new era for Chelsea, and he seemed to be on the right track with the signings of Romelu Lukaku and Oriol Romeu. However, he neglected Chelsea's veterans to the point of mutiny, and his team selections were downright horrible at times. If he hadn't been sacked, I don't think Chelsea would have won either of their trophies.
Steve Bruce: C-
Under Steve Bruce, Sunderland were on their way to a season of relegation scrap. The only reason he isn't getting a worse grade is because he made some impressively shrewd signings in Sebastian Larsson, Ji, Wes Brown, John O'Shea and Nicklas Bendtner (on loan).
Neil Warnock: C
QPR were certainly heading downhill with Neil Warnock, but I don't think sacking him and bringing in Mark Hughes was exactly a turning point in their season. If Warnock wasn't sacked, QPR may have well survived in the Premier League anyways.
Mick McCarthy: C
Mick McCarthy was the man who brought Wolves into the Premier League, he was the man who kept them in the Premier League for two seasons, and he was the man who had the best chance at keeping them in England's top tier for a third season. He was sacked impulsively and foolishly after Wolves' bad run of form in the middle of the season was capped off by a 5-1 loss to local rivals West Brom.
If Wolves can get Mick McCarthy back, they certainly should
How do you think each of the Premier League managers performed this season?