What happened: Los Angeles Chargers center Tyler Biadasz, linebacker Kyle Kennard and wide receiver Quentin Johnston sustained injuries during a joint practice with the San Francisco 49ers. Biadasz required a medical cart after 49ers defensive tackle Sebastian Valdez fell on his left knee during an 11-on-11 period. Johnston limped off the field following a leaping catch attempt on the sideline.

Why it matters: Biadasz's departure creates an immediate void in the middle of the offensive line in front of quarterback Justin Herbert. Multiple injuries in a single session test the roster depth as the preseason progresses.

What to watch: Medical evaluations will dictate the recovery timeline and next steps for the three players.