Buffalo Bills

Starting QB Tyrod Taylor suffered a concussion and twotime Pro Bowl DT Marcell Da

reus was sent home for violating an unspecified rule. Taylor’s injury, which occurred on his second series in a loss to the Baltimore Ravens this weekend, leaves his status for opener in doubt.

Before leaving during the second series, Taylor’s preseason struggles continued, and he has a 48% completion percentage in three games. Rookie QB Nathan Peterman replaced him and will become the starter if Taylor is not cleared. The Bills also signed QB Keith Wenning.

Dareus, the third overall pick in 2011, has experienced numerous off-field problems during his career. He was suspended for four games for violating the NFL’s substance-abuse policy last season and missed four more games with injuries. Buffalo signed Dareus to a six-year, $108 million extension before the 2015 season.

“Obviously a guy with his contract status, you would hope that he would be a better leader than that, and hopefully he learns from it and moves on and continues to be a Buffalo Bill,” general manager Brandon Beane said.

Rookie watch: The firstteam offense gained 11 yards in 16 plays in Peterman’s first four series, but he did lead the Bills on an 11-play, 83-yard touchdown drive late in the first half. … LT

Cordy Glenn is expected to return from a foot injury in time for the opener, but a contingency plan has second-round pick Dion Dawkins at the blindside spot.

Noteworthy: RB LeSean McCoy says he has received assurances that the team isn’t interested in trading him. ... DT

Adolphus Washington has been acquitted of a weapons charge by an Ohio judge. He was arrested in July on a charge of improperly carrying a concealed weapon outside a water park. Washington could still face NFL discipline.