According to Transfermrket.co.uk Mourinho has taken West Ham as a manager 16 times, winning 11, drawing three and losing just two games.
Pellegrini has a rivalry with Mourinho that dates back to when Mourinho succeeded him at Real Madrid.
He once nicknamed the 66-year-old as Mr. Pellegrino, a nickname he continues to use. Mourinho was happy to fire snide barbs at his predecessor, saying “If they [Real] get rid of me, I will go to a big club in the Premier League or Serie A,” when Pellegrini went to Malaga.
Their war words continued in the Premier League while Pellegrini managed Manchester City and Mourinho managed Chelsea. We can expect more ward of words and mind games from the Special one anytime soon.