INDIANAPOLIS — The San Francisco 49ers have signed defensive tackle Quinton Dial to a three-year contract extension through the 2019 season. The 25-year-old Dial was a fifth-round pick by the 49ers out of Alabama in 2013 and had 59 tackles and 2.5 sacks last season while starting 15 games. General manager Trent Baalke says during his first three seasons Dial "has shown consistent development and has become a key contributor in our defense."