Sammy Watkins left in the first quarter of the Buffalo Bills' preseason finale on Thursday when he reinjured his ribs.

Watkins should be available to start in Week 1 for the Bills despite the injury.

Bill Belichick is ranked as the best coach in the NFL, according to a poll of 30 league insiders.

Pete Carroll and Sean Payton are ranked second and third and are also in their first tier.

"The most important thing to me is the ability to control the offense, the defense and the special teams," a GM said in describing the ideal coach. "You can change and you can coach multiple things and you have the ability to teach almost every position group. Then you can lose any coach you want and replace from within because the head coach is the talent. Belichick is the ultimate model of that."

Belichick commmanded a 1 vote on 28 of 30 ballots.

In Tier 2 are Andy Reid at No. 4, Tom Coughlin at No. 5, Mike McCarthy and Mike Tomlin at No. 6, Jim Harbaugh at No. 8, John Harbaugh at No. 9, John Fox at No. 10 , Jeff Fisher at No. 11, Chip Kelly at No. 12, Bruce Arians at No. 13, Lovie Smith at No. 14 and Mavin Lewis at No. 15.

Tier 3 is led by Chuck Pagano At No. 16, followed by Rex Ryan (17), Mike Smith (18), Gus Bradley (19), Ken Whisenhunt (20), Mike McCoy (20), Marc Trestman (22) and Ron Rivera (23).

Tier 4 features Mike Zimmer (24), Jay Gruden (25), Bill O'Brien (26), Jim Caldwell (27), Doug Marrone (28), Joe Philbin (29), Jason Garrett (30), Mike Pettine (31) and Bruce Allen (32).

Sammy Watkins suffered a rib contusion during the Buffalo Bills' preseason game on Saturday against the Pittsburgh Steelers.

"They're going to run tests and everything and we'll see how he is," Doug Marrone said.

Watkins took a hit from Ryan Shazier on a third down pass from EJ Manuel.

Doug Whaley denied speculation that the Buffalo Bills have received trade offers for C.J. Spiller.

"We have not been contacted by any team about C.J. Spiller," Whaley said, per the team's official website. "These rumors are news to me. It's exciting, I guess, to you guys because it gives you something to fill the newspaper with."

There were reports that Chip Kelly called the Bills in March on Spiller two months before the club tried to trade up for Carlos Hyde.

The Buffalo Bills traded for Bryce Brown and also signed Anthony Dixon this offseason, but Doug Marrone plans to continue featuring a two-back system with C.J. Spiller and Fred Jackson.

"I don’t know if I want to get it down to three. I’ve never been a guy that has three backs playing in the game," Marrone said. "I’ve always believed, and you guys know, in the two backs. It’ll come down to two backs; the two backs going in there."

Marrone has used three backs in the past, but Spiller and Jackson should still see most of the carries.