Astros General Manager Jeff Luhnow announced the following roster moves this morning: IF Japhet Amador and IF Gregorio Petit have been reassigned to minor league camp; LHP Darin Downs has been optioned to minor league camp; OF J.D. Martinez has been released.

Martinez, who was in camp as a non-roster invitee, had been with the Astros organization since being selected in the 20th round of the 2009 June Draft. With today's moves, the Astros Spring Training roster is now at 34 players.