Buffalo Bills defensive lineman Marcell Dareus fails conditioning test

FILe - This Oct. 20, 2013 file photo shows Buffalo Bills defensive tackle Marcell Dareus (99) looking up during the first half of an NFL football game against the Miami Dolphins in Miami Gardens, Fla. Dareus is scheduled for trial in September on charges filed after a crash that police say happened during a street race. Dareus was in town court in the Buffalo suburb of Hamburg on Tuesday, July 1, 2014, when a judge set Sept. 9 for a nonjury trial. (AP Photo/Lynne Sladky, File)

It hasn't been the best few months for the Buffalo Bills' promising defense, and defensive tackle Marcell Dareus has been a big reason for that.

Dareus, who earlier this offseason was busted for both possession of synthetic marijuana and for drag racing, failed his initial conditioning test run as the team reported to training camp. Dareus will remain on the active/non-football injury list until he can pass the test. 

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"He's not the only one, but obviously you want your players to come in and be ready to go," head coach Doug Marrone said Sunday, per ESPN.com. "We're here for a long period of time and we'll make up for it."

Is Dareus committed to football after a bad few months where you easily could call that into question? Marrone said he believes so.

"I think that's what he'll be ready to do and that's been my conversations with him," Marrone said.

The Bills' defense, which ranked in the top 10 a year ago, is changing coordinators from Mike Pettine, who left to take the Cleveland Browns' head-coaching job, to Jim Schwartz. They already have lost one of their best playmakers in Kiko Alonso, who was coming off a fantastic rookie season.

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Eric Edholm is a writer for Shutdown Corner on Yahoo Sports. Have a tip? Email him at edholm@yahoo-inc.com or follow him on Twitter!

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