Herbert (ankle/thigh) won't practice Wednesday, Eric Smith of the Chargers' official site reports.
Chargers head coach Jim Harbaugh said earlier Wednesday that Herbert is dealing with a left ankle injury unrelated to the one he dealt with earlier this season, as well as a leg contusion, per Daniel Popper of The Athletic. Herbert left Sunday's loss to the Chiefs in the second quarter, but then returned in short order and led the Chargers offense to 17 points after halftime. He'll likely play against Tampa Bay on Sunday even if he's not 100 percent healthy, although Taylor Heinicke and Easton Stick are taking extra reps in practice at the start of the week.