SANTA CLARA — The 49ers came out firing on all cylinders in the first half of their loss to the Detroit Lions on Monday, but couldn’t maintain the production through all four quarters.
San Francisco’s PFF grades from the 40-34 defeat show high-powered performances from rookie wide receiver Ricky Pearsall, who had a much-anticipated breakout performance, and George Kittle, who arguably is one of the best tight ends the NFL has ever seen.
Brock Purdy was largely well protected through much of the game behind a patchwork offensive line, allowing the quarterback to place the ball downfield with several explosive plays…