San Francisco 49ers running back Isaac Guerendo gave a positive update on his knee injury Monday, noting he did not tear his ACL as some had speculated: ACL is good, thank you GOD. I'll be back ...

Guerendo also praised the 49ers' locker room culture, noting that he's leaned on advice from teammates on both sides of the ball. He credited linebacker Fred Warner, among others, for their guidance.

Well this isn't good. 49ers rookie Isaac Guerendo is nursing a new injury. Kyle Shanahan revealed Guerendo was held out of Wednesday's practice with a hamstring injury. He sustained the injury in ...