Is secondary the 49ers biggest weakness?

Roster evaluations are going to be continuing into the preseason and until the team gets pads on and plays a preseason game or two, we won’t know the true strengths and weaknesses. That’s not stopping analysts from taking a look.

NFL.com’s Gregg Rosenthal listed the weaknesses of all 32 NFL teams and listed secondary as the San Francisco 49ers weakness:

The 49ers entered the draft with a major need at cornerback and surprisingly waited until Day 3 (D.J. Reed in Round 5) to address it. They believe in raw cover men Ahkello Witherspoon and K’Waun Williams, despite a pass defense that ranked among the league’s worst last year. They are betting big on Richard Sherman looking like Richard Sherman…