The 49ers suffered another significant injury to their secondary Sunday morning when starting nickel back K’Waun Williams sprained his left ankle during team drills.

Check out Grant Cohn’s Periscope report and one-on-one pass-rush video from Sunday’s training camp practice.

The pair will share playing time and split carries for the 49ers this season. Fans might struggle telling them apart. But in many ways, they’re total opposites.

The 49ers veteran cornerback pulled his hamstring Friday morning at training camp.

Here’s who stood out during the sixth padded practice of training camp.

Check out Grant Cohn’s Periscope report and two-on-two pass-rush video from Friday’s training camp practice.

The wide receiver has been one of the most impressive rookies in training camp.

Here’s who stood out during the fifth padded practice of training camp.

Check out Grant Cohn’s Periscope report and one-on-one pass-rush video from Thursday’s training camp practice.

Every position on offense and defense is set except right guard. The 49ers want to have a right guard competition. But Joshua Garnett and Jonathan Cooper, the main competitors, are injured.

Check out my interview with on KNBR with Gary Radnich and Larry Kreuger from Wednesday afternoon.

Check out Grant’s interview with Rotoviz Radio from earlier this week.

Here’s who stood out during the fourth padded practice of training camp.

Check out Grant Cohn’s Periscope report and one-on-one pass-rush video from Wednesday’s training camp practice.

Starting defensive linemen Arik Armstead pulled his hamstring on Sunday, and the injury is “somewhat” serious, according to 49ers head coach Kyle Shanahan.

Here’s who stood out during the third padded practice of training camp.

Check out Grant Cohn’s Periscope report for Tuesday’s training camp practice.

Here is a video of the 49ers pass-rush drills from Day 5 of training camp.

Here’s who stood out during the second padded practice of training camp.

Richard Sherman and Pierre Garcon have history.