Sosa was added to the Cardinals' 40-man roster Friday.
The 20-year-old shortstop won't be an option for the major league team anytime soon -- he just advanced to the High-A level late in 2016 -- but he had to be added to the 40-man roster for Rule 5 protection. Sosa has hit at a nice clip in the minors but doesn't pack much power, and at 5-foot-11, he doesn't project to add a whole lot in time.