Oakland signed cornerback Chance Casey off the practice squad of the San Francisco 49ers to take Moore's place on the active roster Tuesday.
Moore started 11 games in his second season. He had 79 solo tackles, three sacks, two passes defensed and one forced fumble. He is considered to be a building block on the Raiders defense.
Casey spent last season with the Raiders. He was mostly on the practice squad but played two games. He was waived at the end of training camp this year.
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