SportsNet Central August 21, 2020 2:12 am Shanahan, Bosa impressed by ‘elite' Trent Williams 49ers left tackle Trent Williams missed the entire 2019 season but has continued to impress his new teammates at training camp. 49ers videos 1:02 Smith reacts to being called toughest opponent Staley, Williams faced 2:01 Aldon Smith reflects on NFL career, lessons learned 2:51 Former 49er Aldon Smith shares message to youth on mental health 0:58 49ers Talk: 49ers sign Terrell Owen's son Terique as undrafted free agent 1:25 49ers Talk: Is ‘writing on the wall' for Samuel's future in San Francisco?