The 1989 San Diego Chargers season was the franchise's 20th season in the National Football League (NFL), its 30th overall and the first season under head coach Dan Henning, whose predecessor, Al Saunders, had been fired shortly after the previous season. The combination of a strong defense and mediocre offense led to several close finishes - thirteen games were decided by seven points or fewer, including the last twelve in a row. Before the NFL adopted the two-point conversion in 1994, this was tied for the most one-score games in a single season.