Seems like Stevie Ray wrote to Taisumov on twitter about the fight and Taisumov said no because he already has an opponent.Taisimov Barboza then since EDson said he can fight by march.
Dude there is not much evidence that this fight was ever offered to Pettis. Mairbek or his manager not so long ago said that UFC offered fight with Taisumov to Cowboy and he turned it down and Helwani said that it's not true fight with Taisumov wasn't offered to Cerrone.I dont blame pettis. I dont think he'd be able to hurt the dude. He's too weak. Only a well connected head kick would do it but all you have to do is go forward on pettis and he cant kick. he's figured out.