Interior cracks evident in 49ers’ season opener

On Aug. 31, the 49ers traded for Lions guard Laken Tomlinson and the deal suggested they had concerns about the interior of their offensive line. On Sunday, this became evident: Those concerns were warranted. The 49ers surrendered four sacks and eight quarterback hits -- and left guard Zane Beadles had a dubious distinction. According to Pro Football Focus, Beadles allowed a sack, a quarterback hit and four hurries. His Week 1 performance was the worst among NFL guards through Sunday's games, according to PFF's grading system. Head coach Kyle Shanahan's assessment of Beadles' 2017 debut? "I think it was up and down," Shanahan said. "He did some good things in the game.