Within days of the Raiders drafting running back

Josh Jacobs in the first round Mike Nugent Jersey , the Raiders have lost the man with whom he was to share the backfield this season. Recent free agent acquisition I..."WhiteFanposts Fanshots Raiders StoriesScheduleRosterStatsYahoo Raiders NewsYahoo Raiders Team PageYahoo Raiders ReportYahoo Raiders Depth ChartYahoo Raiders TransactionsYahoo Raiders PhotosOdds About Masthead Community Guidelines StubHub ✕Raiders RB Isaiah Crowell tears achilles in offseason workouts, lost for seasonNew,167commentsPDTShareTweetShareShareRaiders RB Isaiah Crowell tears achilles in offseason workouts, lost for seasonOakland RaidersWithin days of the Raiders drafting running back Josh Jacobs in the first round, the Raiders have lost the man with whom he was to share the backfield this season. Recent free agent acquisition Isaiah Crowell has torn his Achilles and is lost for the season according to ESPN’s Adam Schefter.Crowell has 3803 rushing yards and 27 touchdowns in 51 career starts averaging 4.3 yards per carry over five NFL seasons. He added a proven starter to the team and would have made a great complement for Jacobs at the running back position.The team may now need to add someone to replace Crowell as Gruden typically prefers to deploy two backs. Last year’s starter Doug Martin is still out there. He averaged 4.2 yards per carry for the Raiders last season and just turned 30 years old. The running backs currently on the roster are Jalen Richard, Chris Warren III, and DeAndre Washington.Follow @LeviDamien ALAMEDA, Calif. (AP) — The Oakland Raiders practiced at an off-site facility for a second consecutive day Friday as thick smoke from California's deadly wildfires blanketed the Bay Area.Much like they did a year ago when similar conditions arose due to fires in Northern California, players and coaches were bused to an indoor gym at the former Alameda Naval Air Station for practices Thursday and Friday.Although the Raiders were forced to scale back their workouts as a result, coach Jon Gruden was mostly pleased with how things went under the circumstances. "It's like an indoor ice rink that was transformed into a soccer field," Gruden said. "We didn't have much room to get the splits and get the routes but I'm not going to make any excuses. We're not the only people dealing with adversity right now. It was either that or get nothing so I'm really pleased with the players Jim Otto Jersey , the coaches and the preparation that we were able to get in."Smoke has filled the sky in Northern California for more than a week and the air quality has been at dangerously unhealthy levels in recent days.The Raiders will get a break from the conditions with road games each of the next two weeks. They play Sunday in Arizona and are in Baltimore to face the Ravens on Nov. 25."We have to deal with what we have to deal with," Gruden said. "We got a lot of reps in. We are confident that they know what to do. We just have to trust that they'll go out there and perform at the highest level possible."The Raiders have lost five straight games and are 1-8 overall. Offensive coordinator Greg Olson said that the fires have helped keep things in perspective."Our hearts go out to all the people who lost lives and property, and certainly to all the first responders." Olson said. "For us, yeah, we are missing a practice. We are missing the ability to go outside, but for other people it's changing their lives or has changed their lives. Nobody here on this team has lost lives or property, so we are fortunate in that regard."Right guard Gabe Jackson has tried to remain indoors as much as possible to avoid the smoke-filled air."From being here to going home I haven't spent much time outside," Jackson said. "You're always concerned about what's going on around you, especially the people that's affected, but at the same time you have to do what you have to do."Notes: Wide receivers Jordy Nelson (knee) and Martavis Bryant (knee) did not practice and are out for Sunday's game. . Cornerback Gareon Conley (groin) is questionable.