After 14 games, the Cowboys had a 9–5 record and would have made the playoffs had they won one of their two remaining games, or win the division had they won both games. However, the team gave up a 15-point lead against the Washington Redskins in week 15, and then lost to the Miami Dolphins by a touchdown surrendered with less than a minute to play in the final week of the season. The season was overshadowed by a quarterback controversy between Danny White and Gary Hogeboom, with Hogeboom getting the majority of the starts.
The season's nadir occurred in week 12, when the 0-11 Buffalo Bills defeated the visiting Cowboys 14-3.
In their first visit to Rich Stadium and first overall to Buffalo since 1971, the Cowboys lost for the first time in four meetings with the Bills. The teams did not meet again until Super Bowl XXVII.
Week Twelve: Dallas Cowboys at Buffalo Bills – Game summary
The Cowboys announced that they would celebrate their 25th anniversary during the 1984 season under the theme "Silver Season".
The sale of the franchise from the Murchison family to an 11-member limited partnership headed by Dallas businessman Harvey Roberts ("Bum") Bright was approved by NFL owners on March 19 and the sale was completed on May 18.
Gary Hogeboom replaced Danny White as the starting quarterback in the preseason, and a quarterback controversy ensued throughout the season. After a 4–1 start, Hogeboom played poorly in losses to St. Louis and Washington, and was replaced by White in both games. The following week against New Orleans, White had to relieve Hogeboom again, this time after Hogeboom injured his right wrist early in the second half. White led the Cowboys to victory, overcoming a 21-point deficit in the fourth quarter.
White started the next two games, but after a poor performance by both quarterbacks against the Giants, Hogeboom regained the starting position. The constant change at quarterback didn't help the team's inconsistent play, and they reached their lowest point at Buffalo late in the season, suffering a humiliating 14–3 loss at the hands of the winless Bills. Afterwards, White would go on to start at quarterback for the rest of the season. Still, despite all the turmoil surrounding the Cowboys, they held a 9–5 record going into the season's final two weeks and were tied for the division lead. However, two heartbreaking losses to the Redskins (a game in which the Cowboys led 21–6 at halftime) and Dolphins ended the Cowboys' string of postseason appearances at nine.
The Cowboys perennially potent offense fell into disarray during the 1984 season. The offensive line was ravaged by injury and retirement, and Cowboy quarterbacks were under duress all season. The line also struggled to open holes for the running game, despite another productive season from running backTony Dorsett, who rushed for 1,189 yards. Turnovers were another source of frustration, as the offense turned it over 42 times. The defense once again featured a strong pass rush, led by perennial all-pro defensive tackleRandy White, as well as an opportunistic secondary, with safetyMichael Downs leading the way with seven interceptions. However, stopping the run was a problem throughout the season, as the defense allowed 4.4 yards per carry.
