The 1984Detroit Lions season was their 55th in the National Football League. The team failed to improve upon their previous season's output of 9–7, winning only four games.[1] The team missed the playoffs for the first time in three seasons. In a Lions season littered with numerous key injuries, the most painful was star running back Billy Sims suffering a career-ending knee injury in a game against the Minnesota Vikings during the season. In just five seasons in the NFL, Sims would set the Lions career rushing mark at 5,106. [2]