The Pittsburgh Pirates have added shortstop Gift Ngoepe to their 40-man roster, according to their official roster page. Ngoepe would have been eligible for minor league free agency soon, and this move keeps him around in the system, much like the addition of Keon Broxton in September kept him in the system.
Ngoepe is the best defensive shortstop in the system, due to his extremely smooth glove work, and exceptional range and routes. He's also able to provide speed on the bases. Those two skills will eventually get him in the majors as a bench player, backing up the shortstop position.