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Ball’s biggest rushing game came last year at Kansas City — where the Broncos play next — when he ran 30 times for 96 yards after both McGahee and Moreno went out with injuries.

“I think we all have each other’s back,” Ball said. “If Ronnie needs to come out or if he feels like I need to step in for him, I think we keep it rolling. I think that’s our mentality, is we keep the ball rolling.”

Moreno, the team’s 2009 first-round draft pick, recovered from a torn knee ligament in that game at Kansas City last year and was expected to get playing time in 2012. He hasn’t been on the active roster, however, since losing a fumble in Week 2 against Atlanta.

“That was weeks ago. I’m not thinking about that,” Moreno said. “All I’m thinking about now is now, and doing the things I need to do to get on the field.”

Johnson, meanwhile, has been on Denver’s practice squad all season — a demotion of sorts after playing in eight games last season, rushing 14 times for 77 yards.

“That just gives you more of an attitude to go out there and work a little bit harder and show your teammates and the coaches that you’re willing to do anything for that team,” he said. “That’s what I’ve been trying to display to my guys, and hopefully they’ve taken to it.”

Fox didn’t rule out bringing running backs in for a look this week, though signing one would mean finding a roster spot for him. At least at this point, moving McGahee to IR didn’t sound like a possibility.

“Right now, we feel really good about the guys we have,” Fox said. “They’ve trained in our system. It’s pretty extensive.”

Notes: Fox said CB Omar Bolden’s (concussion) status would be evaluated day-to-day. … LB D.J. Williams played 21 snaps in his return and made four tackles. “He had a couple of errors. Just like everybody, he’s not perfect,” Fox said. “I thought, all in all, he had a very good performance.”