It hasn't been released, but here's some hints..
http://news.cincinnati.com/article/2...playoff-roster
However, because of the one-game format and the ability to change the roster after Tuesday’s game for a possible National League Division Series against the Cardinals, there’s little doubt that Billy Hamilton would be available for Tuesday’s game.
[snip]
Some of the Reds September call-ups, such as Neftali Soto and Henry Rodriguez, were not with the team in Pittsburgh.
In all, there were 16 position players with the Reds in Pittsburgh. Last season the Braves carried 16 position players on their wild card roster. In addition to Hamilton, Corky Miller and Derrick Robinson, both who were added to the team in September, are in Pittsburgh.