Kyle Shanahan emphasized the importance of having a veteran like Trent Williams on the team with a bunch of young players.

Left tackle Trent Williams, a month shy of 37, is healthy and still determined to play into his 40s, as evident by him participating in the 49ers’ minicamp.

"I would love to play until I'm 40," Williams recently said from 49ers minicamp. "I would love to make it into that special group. But if it's not in my cards, it's not in my card