49ers lock in young OT Staley through 2017

Left tackle Joe Staley has agreed to a six-year contract extension with the San Francisco 49ers that will keep him with the club through 2017. A first-round pick in 2007, Staley started every game at right tackle as a rookie before moving to the other end of the line last year to replace the injury-prone Jonas Jennings. Staley has played every offensive snap in his first two seasons with San Francisco since joining the club from Central Michigan.