 Defensive end Doug Betters was named the NFL's Defensive Player of the Year.In 1984, the Dolphins won their first 11 games en route to a 14–2 season (the franchise's best 16-game season to date).Marino, in his first full season, produced the most impressive set of passing statistics in NFL history, setting single-season records for most yards (5,084), touchdown passes (48), and completions (362).