Martinez (knee) has been ruled out for Sunday's contest against the Falcons, Dan Salomone of the Giants' official site reports.

Martinez was spotted walking off the field with his arms draped around the shoulders of two trainers during the first quarter. The 27-year-old linebacker has 21 total tackles through the first two weeks of the season. Reggie Ragland will likely garner a majority of the snaps in Martinez's absence.

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