In an already disappointing season, the Raiders received another huge blow Friday.
The Raiders reportedly will be without running back Marshawn Lynch for at least one month with a groin injury.
NFL Media's Ian Rapoport was first to report the news.
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Lynch sustained the injury Sunday against the Seahawks in a 27-3 loss in London. He rushed for 45 yards on 13 carries.
The 32-year-old has rushed for 376 yards and three touchdowns this season on 4.2 yards per carry. He's averaging 62.7 yards per game, up three yards from last season.
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With Lynch out, the Raiders must turn to running backs Doug Martin, Jalen Richard and DeAndre Washington. The 1-5 Raiders are on a bye this week and play the Colts in their next contest on Sunday, Oct. 28.