Stewart coached the San Diego Chargers' secondary for three seasons before following coach Wade Phillips to the Cowboys. Stewart also spent two seasons as a defensive assistant with the Houston Texans.
Though Stewart had the title of defensive coordinator with the Cowboys, his actual responsibilities were unclear. Phillips, a former defensive coordinator, sometimes took over play-calling duties and other times left it unclear who was making the defensive decisions.
The Cowboys gave up 22.8 points per game, which was 20th in the league.