As posted in the ORD by reds44, the Reds have release the spring training roster and announced the non-roster invitees, here is the post from Fay's blog:

From the Reds:

TODAY’S NEWS: Pitchers and catchers report to the Reds’ Player Development Complex in Goodyear, Arizona on February 18…after physical examinations, they will work out that later afternoon…position players will report February 23 and following physicals will work out that afternoon…third-year manager Dusty Baker’s coaching staff is scheduled to report February 16…minor league pitchers and catchers report March 4 and position players March 9.

CACTUS LEAGUE: The Reds’ spring training roster includes 53 players overall, 26 pitchers, 7 catchers, 12 infielders, 8 outfielders and 13 non-roster invitees…the spring training rosters are attached…most recently, the club invited to Major League camp 63 (2009), 65 (2008), 57 (2007), 63 (2006), 55 (2005), 56 (2004), 64 (2003), 70 (2002), 58 (2001), 72 (2000), 54 (1999), 51 (1998), 55 (1997) and 59 (1996) players.

SPRING TRAINING INVITEES (13): The Reds have signed to minor league contracts and invited to Major League spring training camp pitchers (3) RHP Mike Leake, RHP Justin Lehr and LHP Alexander Smit; catchers (5) Wilkin Castillo, Chris Denove, Devin Mesoraco, Corky Miller and Brandon Yarbrough; infielders (3) Chris Burke, Zack Cozart and Todd Frazier; and outfielders (2) Josh Anderson and Laynce Nix.
On the roster, players have also been assigned numbers, and most of the new roster additions and non-roster invitees have been given high numbers in the 60's or 70's, except for Castillo (26), Nix (17), and Miller (37) who all played on the team, Burke (16) and ... Chris Heisey (28). Interesting...