Defensive tackle Marcell Dareus is facing a four-game suspension for another violation of the league's substance abuse policy, a source informed told NFL Media Insider Ian Rapoport.

The Buffalo Bills aren't finished adding depth to their banged-up defense. The team added veteran pass rusher Kroy Biermann to the mix on a one-year deal.

We've got you covered today with live coverage on NFL Network all day. On NFL.com, we're featuring highlights from our TV coverage and notes from our reporters in the field. Here are today's whispers.

Arian Foster's Miami career will start on the sidelines, as the new Dolphins running back has been placed on the PUP list as camp opens.

Chad Reuter says these prospects will either delight or be major disappointments in the NFL. Heisman winner Derrick Henry and OSU star Braxton Miller are among his top boom-or-bust players.

The Dallas Cowboys' coaching staff worked with Carson Wentz at the Senior Bowl, and they are projected to select the North Dakota State QB in Chad Reuter's four-round, 127-pick mock draft.

Aaron Donald and Robert Quinn headline a Rams defensive front that leads Chris Wesseling's Top 10 list this week. Find out where the Bills and Dolphins rank among the NFL's best front sevens.

Count the San Francisco 49ers, Dallas Cowboys and Green Bay Packers among those franchises that got the most out of their draft classes in the past decade.

Elliot Harrison rounds up the draft priorities of each team in the AFC East -- including the Buffalo Bills, who could have a special defense on their hands if they take Anthony Barr at No. 9.

Alabama's C.J. Mosley, considered the best inside linebacker in the draft and perhaps the second-best linebacker overall, met with the Buffalo Bills on Thursday.

This free-agent class of quarterbacks is pretty thin, but Michael Vick could be the biggest difference maker of the bunch. Elliot Harrison finds a potential home for the veteran QB in the AFC East.

As history shows, speed alone won't be enough for Jadeveon Clowney to reach stardom in the NFL.

Jadeveon Clowney and Michael Sam will be the most watched defensive linemen at the NFL Scouting Combine, and arguably could command the most attention of any prospects at the event.

Buffalo Bills running back C.J. Spiller is expected to play Sunday, coach Doug Marrone said. Spiller missed last week's loss to the New Orleans Saints.

Training camp is upon us. Gregg Rosenthal examines the latest news, from Cleveland Browns running back Trent Richardson's health to the Dallas Cowboys' early injury woes (sorry, Anthony Spencer).

The Miami Dolphins have been busy, but they still have big needs, including at tackle. Might they trade up to pick someone like Lane Johnson? Gregg Rosenthal wonders in his AFC East draft primer.

The Cincinnati Bengals are still exploring linebacker options on the free-agent market. They'll kick the tires on Karlos Dansby on Wednesday.