With September approaching, that means it's time to consider roster expansion. Any player on a team's 40 man roster can be brought up to the majors without needing to send a player down. September call-ups are used to take a look at promising young players who may be in consideration for next season's team or simply to reward players on a good minor league season. The White Sox 40 man roster currently sits at 39, so there's the possibility of another player being added (*cough* Daniel Hudson *cough*) but, of the players on it already who have not made their MLB debuts, who do you think is most deserving?