Cameron and Mingo sat out Sunday's home win over New Orleans. They took part in the early stages of Wednesday's practice while the media were allowed to watch.
Browns coach Mike Pettine said Cameron and Mingo would be limited and doesn't know if they'll play this week against Baltimore.
Pettine expects running back Ben Tate (sprained right knee) to miss his second straight game. Tate was on a stationary bike as his teammates worked out. He got hurt in the season opener at Pittsburgh.
Cameron initially injured his shoulder during training camp and then aggravated it after he fell following a 47-yard reception against the Steelers.
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