Nate Diaz Says He Was Screwed Out Of $9 Mil In Masvidal Fight, Sues Fanmio

Nate Diaz says he was promised $10 million for his fight with Jorge Masvidal ... but he claims he never got 90% of the cash -- and now, he's suing to get money he says he rightly deserves! The former UFC star's attorney, Jeremiah Reynolds, filed…