data-mm-id=”_9z5r5nxl8″>DeAndre Hopkins is finally opening up about the trade that sent him from the Houston Texans to the Arizona Cardinals this offseason. The biggest revelation from the interviews he's given is that he had "no relationship" with Texans head coach and general manager Bill O'Brien. When asked by Sports Illustrated's Greg Bishop about the trade, Hopkins said O'Brien called him and was very "businesslike." Then he said this:””There was no relationship. Make sure you put that in there. There’s not a lot to speak about.””O'Brien was Hopkins' head coach in Houston for six years while the receiver turned into one of the NFL's best at the position. He was a star. And somehow the two had no relationship to speak of. That&…