The former American football player turned big-hitting boxer recovered from his first professional defeat to Johnathon Banks last November by gaining revenge in a return bout in June.
The 26-1-1 boxer now sets his sights on 35-3 ‘Nightmare’ Arreola, who has stopped 30 opponents. The two headline a Showtime card on Saturday.
“Make no mistake about it, this was a fight that I wanted,” explained Mitchell.
“I don't talk a lot in the paper. I don't Tweet. This is the fight that I wanted. Chris Arreola is a great fighter.
“He comes forward and applies a lot of pressure. But I don't see anything special. Nothing I can't take care of on Saturday.
"Every time Chris Arreola has stepped up he's lost. He and his trainer do a lot of talking. But just know that I'm prepared and they can say whatever they want to say but they are going to have a fight on the 7th.
"I've worked hard and I'm ready for this fight. I have speed, power and size. I'm the complete package.”
Arreola responded with some trash talk of his own at the final press conference before the event.
"He [Mitchell] says every time I've stepped up I've lost. You're not a step up, I'm stepping down to you,” he quipped.
“You're way down here. You're a step down and remember that. I didn't have to run the combine or do the 40-yard dash because trust me I do a six-second 40-yard dash and I don't bench press.
“That's not what I do. I'm a boxer and I've been boxing since I was seven years old. I didn't just start boxing just because I couldn't cut it in the NFL or couldn't cut it in football.
"I've been boxing my whole life and I'm going to prove it on Saturday night. I'm going to show you that you don't belong in this sport.
“I'm telling you I'm more prepared for this fight than I've been in a long time. I'm motivated.”
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- Chris Arreola