Because of its uniqueness, Arians couldn't put a timetable on the wide receiver's return.
"We don't really know how long it'll take," Arians said Friday.
"I've never seen it before. All these fingers are out of place."
Arians said Floyd fell on the football during Wednesday's practice, severely bending three fingers backward. Floyd had surgery Thursday and now has a cast on his left hand. When asked how surgery could fix dislocated fingers, Arians looked down to his training camp badge and said he's in the wrong profession to know the answer.
"It don't say 'M.D.,' it say 'coach,'" Arians said with a chuckle. "How the hell would I know? I just know he's got a cast on and his fingers are back."
ESPN NFL Insider Adam Schefter reported Wednesday that Floyd could be back in three to four weeks, which would have Floyd ready for Week 1 against the New Orleans Saints. Arians, though, was noncommittal to that prognosis. When he was asked if Week 1 is a realistic goal, Arians said "evidently," but reiterated the team doesn't know how long it will take for their second receiver to recover.
Wide receiver Larry Fitzgerald said Floyd sent out a photo of the injury to a few of his teammates.
"Unfortunately, a lot of us have seen it," Fitzgerald said. "It's one of those things that you just wish you hadn't seen, but he's a tough guy."