Frank Gore signs one-day contract to retire with 49ers

Frank Gore has signed a one-day contract with the San Francisco 49ers and announced his retirement from the NFL.

Gore spent the first 10 years of his 16-year career with the 49ers and returned to end his career as one of the most prolific runners in league history.

Gore joined the 49ers as a third-round pick in 2005 after overcoming torn ACLs in both knees in college at Miami. Despite that injury history, Gore became one of the most durable…