Rawls didn't practice in full Wednesday after experiencing cramps, Geoff Hobson of the Bengals' official site reports.
The Bengals signed Rawls earlier in the day to restore some backfield depth in the wake of injuries to Joe Mixon (knee) and the since-departed Tra Carson (hamstring), but the former Seahawk wasn't able to make it through his first session for the team. Fortunately for Cincinnati, Rawls' setback doesn't sound like anything that will result in him being unavailable Week 3 against the Panthers, but it's uncertain that the 25-year-old will have a meaningful role with his new team right away. Giovani Bernard is expected to handle a heavy workload as the Bengals' lead back Sunday, with either Rawls or rookie Mark Walton slated to enter the contest whenever Bernard requires a breather.