Cashman (hamstring) was placed on injured reserve Tuesday.

Cashman will sit out at least three games, meaning Week 5 against the Falcons is his earliest return date. With Jamien Sherwood (ankle) also expected to miss two weeks, the Jets signed BJ Goodson to the active roster to add depth at linebacker. They also have Del'Shawn Phillips -- who posted 12 tackles in Week 1 -- on their practice squad.

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