Former England captain Michael Vaughan has spoken about five-time IPL champions Mumbai Indians' devastatingly poor season so far. Vaughan, while speaking to Cricbuzz, has said that it is difficult to see Mumbai making a comeback this season after losing six games on the trot. He also said that this could be a season where Mumbai discovers players for the future and also gave his opinion on skipper Rohit Sharma, whose graph according to him hasn't shot up since taking over as India's captain across all formats earlier this year.