ORCHARD PARK, N.Y. (AP) — Buffalo Bills defensive tackle Marcell Dareus has spent the past three months sticking to his vow to focus solely on football. And he has no intention of deviating off course.

“Interview over,” Dareus said Tuesday when the topic of his spring off-field troubles was broached.

Following an offseason in which he got off on the wrong foot by being arrested for drug possession and car-racing, Dareus’ commitment to doing all the right things is showing signs of paying off.

The 2011 first-round draft pick is having a breakout campaign, anchoring an attacking defense that leads the NFL with 34 sacks as Buffalo (5-4) prepares to play at Miami (5-4) on Thursday night.

Dareus has a single-season best 10 sacks already, which ranks first among NFL defensive linemen and fourth overall.

49ers

SANTA CLARA, Calif. (AP) — 49ers defensive lineman Ray McDonald seeks to restore his relationship with his fiancee as well as resume his football career.

“I have no malice toward anyone,” McDonald said Tuesday, a day after the Santa Clara County district attorney’s office announced it declined to file charges against him an investigation stemming from his Aug. 31 arrest. “I feel like I’m a good guy, a teddy bear.”

McDonald said he’s ready to move forward after spending weeks having his focus divided between football and his offfield activities.

Seahawks

RENTON, Wash. (AP) — Defensive tackle Brandon Mebane will miss the rest of the season for the Seattle Seahawks after being placed on injured reserve following a hamstring injury in a win over the New York Giants.

The roster move was announced Tuesday. Fox Sports first reported that Mebane suffered a torn hamstring. Seattle coach Pete Carroll said Monday that Mebane’s injury was really “legit” but the team was waiting for additional test results.

Mebane was hurt during the first half of Seattle’s 38-17 win.

Mebane’s loss is a blow to Seattle’s run defense, which ranks fourth in the league at 79.8 yards per game. While his stats don’t jump out, Mebane’s ability to clog running lanes and control blockers has allowed Seattle’s linebackers to step up and stop ball carries.

Steelers

PITTSBURGH (AP) — When the Pittsburgh Steelers signed LeGarrette Blount in the offseason, they envisioned the veteran running back as a brawny change of pace behind bouncy starter LeVeon Bell.

It hasn’t quite worked out that way.

Ben Roethlisberger’s avalanche of touchdown passes has overshadowed a startlingly ineffective running game near the goal line. Ten weeks into the season, the Steelers (6-4) have just three rushing touchdowns. Only the winless Oakland Raiders have less.

And while Pittsburgh has survived thanks to Roethlisberger’s MVP-caliber season, when he has struggled Bell and Blount haven’t exactly been able to carry the burden. The Steelers haven’t rushed for a touchdown since Week 3, a span of 191 carries.

Coach Mike Tomlin says his team is balanced offensively but still needs to improve.

Bears

LAKE FOREST, Ill. (AP) — The Chicago Bears have waived former Super Bowl MVP receiver Santonio Holmes.

Holmes signed a one-year deal with Chicago in August after being released by the New York Jets in March. He had eight receptions for 67 yards along with nine punt returns for 50 yards. A first-round draft pick by Pittsburgh in 2006, Holmes was the Super Bowl MVP in his third year. He had his best season statistically the following year in 2009 with 79 catches for 1,248 yards and five touchdowns.

The Bears also signed former Northwestern receiver Rashad Lawrence to the practice squad Tuesday and terminated the practice squad contract of linebacker Terrell Manning. Manning appeared in three games for the Bears this season.