SANTA CLARA — The 49ers suffered another significant injury to their secondary Sunday morning.
Starting nickel back K’Waun Williams sprained his left ankle during team drills. He exited practice riding shotgun in the trainer’s cart. Williams is the second 49ers starting defensive back to injure himself since Friday, when cornerback Richard Sherman gave up a long catch to wide receiver Pierre Garcon, then suffered a Grade 1 hamstring strain chasing him across the field.
Williams sprained his ankle making a terrific play. Quarterback Jimmy Garoppolo had just completed a screen pass to wide receiver Aaron Burbridge. Williams sprinted into the backfield and tagged Burbridge for a 1-yard loss before he even took a step.
The play was over. Williams ran past Burbridge and raised a finger in the air, letting everyone know he made the stop and not someone else. Then, his left leg buckled, and he dropped to the ground.
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