The Vikings signed McCain on Monday.
McCain (illness) is inactive ahead of Sunday's game against the Commanders, Dan Salomone of the Giants' official site reports.
McCain is questionable for Sunday's game against the Commanders due to an illness, Charlotte Carroll of The Athletic reports.
McCain was absent from the Giants' injury report Wednesday ahead of Sunday's game against the Cowboys.
McCain left Saturday's preseason game against the Jets and is being evaluated for a concussion, Pat Leonard of the New York Daily News reports.
McCain appeared in 17 games (16 starts) during the 2022 season and recorded 76 tackles (54 solo).
McCain tallied 11 tackles (nine solo) in Sunday's Week 15 loss to the Giants. He also forced a fumble that was recovered by the Giants.
McCain recorded eight tackles (six solo) and a pass defended during Sunday's 17-16 win against the Colts.
McCain agreed to a two-year, $11 million contract with the Commanders on Tuesday, Adam Schefter of ESPN reports.
McCain posted 10 tackles (seven solo) in Sunday's 20-16 loss to the Chargers.