There is no official timeline for wide receiver Michael Floyd's return from finger surgery, but there is optimism he will make it back in time for the regular season opener.

As many of his teammates can attest, the hand injury wideout Michael Floyd suffered at training camp on Wednesday was not pretty.

Coach Bruce Arians confirmed three of Floyd's fingers were dislocated when his hand bent back after it landed on the ball as he dove for a pass during 1-on-1 drills. Floyd sent a photo of the injury to some of the Cardinals before a cast covered it up.

"Unfortunately, some of us have seen it," wide receiver Larry Fitzgerald said. "It's one of those things you wish you hadn't seen."

While his teammates could have done without the image, there is optimism they won't have to be without last year's leading receiver for as long as originally thought. While Arians said there was no timetable for Floyd's return because the injury was so unique, the season opener against the Saints is "evidently" a realistic goal, Arians said.

"We don't really know how long it's going to take," Arians added.

Pressed on the timeline, Arians glanced at his training camp credentials hung around his neck and said, "it doesn't say M.D., it says coach. How the hell would I know? All I know is he's got a cast on and his fingers are back."

Fitzgerald said Floyd was in great spirits following the surgery.

"He's a tough guy," Fitzgerald said.

Arians said Floyd's absence will give the wide receivers behind him a "great opportunity" to showcase their skills during camp. John Brown will move up to the second receiver role, while the battle heats up between Jaron Brown, J.J. Nelson and Brittan Golden for the third receiver spot while Floyd is on the shelf.

Arians said he was already considering keeping six receivers when the roster gets reduced to 53 players, and Floyd's injury makes that more likely. Jaron Brown, Golden and Nelson have all elicited praise at different times during camp.

"We pride ourselves on being a deep group," Jaron Brown said. "One man goes down, the next man has to step up."

MORE PRAISE FOR KERWYNN

There seems to be a clear favorite in the battle for the third running back spot on the roster.

With Andre Ellington and rookie David Johnson on the mend from hamstring injuries, Kerwynn Williams has practiced regularly with the first team. While he doesn't have the same receiving skills as the other two, Williams has impressed with is running ability. He is trying to beat out Stepfan Taylor and Marion Grice for the spot.

"He's the best one we've got right now (among the healthy backs)," Arians said.

Williams filled in admirably in a pinch last season and is again trying to benefit from increased opportunity.

"You just try to make that extra exposure count," Williams said. "You want to continue to practice hard and bring your 'A' game every time."

NO CONCERN WITH WEATHERSPOON

Guard Earl Watford (ankle) will return to practice on Friday, but he was the only one to return from the long injury list. Those sidelined in addition to Floyd are Ellington (hamstring), Grice (hamstring), Johnson (hamstring), tackle Rob Crisp (knee), tackle D.J. Humphries (knee), linebacker Shaq Riddick (hamstring), linebacker Darryl Sharpton (hip), linebacker Zack Wagenmann (foot) and linebacker Sean Weatherspoon (hamstring).

Weatherspoon hasn't practiced in pads yet, and even though he has only played seven combined games the past two seasons, Arians isn't concerned about him at this point. Weatherspoon could be back early next week.

"He's getting all those walkthrough reps, assignment-wise," Arians said. "It's just a matter of going out there and tackling."

SENDLEIN RE-SIGNS WITH CARDINALS

Center Lyle Sendlein, who has been the Cardinals' starting center since 2008, re-signed with the team on Friday after getting cut in a salary cap move this offseason. Sendlein will compete with A.Q. Shipley and Ted Larsen for the starting job.

Wide receiver Travis Harvey and guard Nate Isles were also signed, while quarterback Chandler Harnish was released.