The ruling by the 2nd US Circuit Court of Appeals means Elliott will begin serving his suspension this weekend, ruling him out of Sunday's game against the Atlanta Falcons.
Elliott has been embroiled in a legal saga with the NFL after being issued a six-game suspension following a 13-month investigation into a domestic violence allegation in 2016.
Although Elliott faced no criminal charges from the case, the NFL probe found him to have been in breach of the league's personal conduct policy.
Elliott has bitterly contested the ban and had until Thursday successfully fought to delay the activation of the suspension, playing in all eight of the Cowboys' regular season games in 2017.
source: news.abs-cbn.com
