The San Francisco 49ers fired defensive coordinator Nick Sorensen after just one disappointing season, a person familiar with the decision told The Associated Press. The person spoke on condition of anonymity because the move hadn't been announced.

In its closing act, Sorensen’s unit allowed a season-high 47 points and produced no takeaways or sacks in Sunday’s 47-24 defeat at Arizona.

Sorensen spent just one season as the 49ers defensive coordinator after the team fired Steve Wilks last season. The 49ers ranked eighth in defensive yards, but allowed the fourth most points in the NFL. The 49ers struggled especially in the fourth quarter, being outscored by 52 points in the final frame.