This is just my list. Feel free to adjust, Mr. Rizzo.
40-man roster guys: Taylor, Souza, Leon, Solano, Moore, Kobernus, Perez and pitchers Barrett, Cedeno, Hill, Treinen. (Wish we had one more left-handed bat in the bunch.)
Non-40 possibles: Burriss (ss), Baird (3b) and Raphael Martin (0.0 ERA in 26 innings at AAA).
To do this, they'd have to drop guys from the 40 and they would be Ryan Mattheus, Felipe Rivero and Sammy Solis. Don't think they'll give up on Solis and they may give Mattheus another chance - mistake - but one or two of those three might make it to DC.
Syracuse has a good chance for post-season play, however, so Rizzo may take pity on them until/if they are eliminated and leave them with half these guys.