Coach Jay Gruden says Friday that Culliver tore his ACL and MCL in practice Thursday.
Gruden calls it ''just a fluke deal,'' adding that Culliver ''went up for a ball, landed on (the knee) and it tore.''
Washington's other starting cornerback, Bashaud Breeland, sat out practice Friday with a fever and was listed as questionable for Sunday, when the Redskins (4-6) host the New York Giants (5-5), with first place in the NFC East at stake.
Gruden said about Breeland: ''Hopefully it's just a 24-hour bug or something like that.''
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