Scandrick will be eligible to return to action on October 5 against the Houston Texans.
Entering his seventh season in the NFL, Scandrick started 15 of 16 games for the Cowboys last season. He had 64 tackles, two interceptions and a forced fumble.
His absence will further weaken a Dallas defense already missing key players due to injury.
(Writing by Jahmal Corner in Los Angeles; Editing by Peter Rutherford)