Stephenson (wrist) has begun a rehab assignment in the Arizona Rookie League, RedsMinorLeagues.com reports.
Stephenson's development time has stalled because of the wrist injury, but the good news is that they expected him to take awhile, given that he was drafted from high school. The bad news for him is that the Reds drafted another catcher early this year in Chris Okey, who was taken in the second round, and Okey has already been promoted to Low-A Dayton, where Stephenson was playing prior to the injury.