Yes, they played together for the opening game of the 1984 season, before Campbell was traded to the Saints.
During this game, Earl Campbell was still the Oilers' running back, and they were joined in the starting lineup by future Hall of Fame linemen Mike Munchak and Bruce Matthews.
As per Sportsecyclopedia.com, Earl Campbell's trade left a gapping hole at runningback. Their defense was also a weak spot as the Oilers finished with a 2-14 record, allowing 457 points on that season.
Earl Campbell played a season and a half with the Saints before retiring after the 1985 campaign. Warren Moon on the other hand set a new club record with 3,338 yards passing in his first year with the Houston Oilers, a mark he would break four more times.
Learn more about Houston Oilers by checking these 5 fun facts shared by Iqfb.com.