Clinton-Dix is the most high-profile player of the three, as the Bears signed him in March to pair as a starter alongside All-Pro safety Eddie Jackson. Clinton-Dix suffered a knee sprain near the end of mandatory mini-camp in June, but the Bears don't expect that to be a long-term injury, general manager Ryan Pace said Sunday.
Clemmings is recovering from knee surgery, and Harris has a hamstring injury.
Their designations mean they aren't allowed to practice with the Bears, but they can be moved from the PUP list to the active roster at any time in the preseason.
Outside of those three, the Bears are healthy entering camp, Pace said.