"Yeah, it's not gonna happen. It's not gonna happen, there's no room," Arians told Tiki and Tierney of CBS Sports. "It's not a fit here."
The head coach, who previously coached Brown with the Pittsburgh Steelers, even said he wouldn't want the wideout on the veteran's minimum.
"No. I just know him and it's not a fit in our locker room," said Arians.
Teams that chased the star quarterback reportedly believed he wanted a reunion with the receiver, who played one game for the New England Patriots last season before being released.
On Wednesday, Brown appeared to lobby for a spot with the Bucs. Asked on Instagram if he would sign with the NFC South team, the receiver responded, "expeditiously."
Brown's playing status is still being reviewed by the NFL following separate allegations of sexual assault and sexual misconduct.