Where's Betancourt

Sometime ago I was reading on baseball america.com that the Braves signed a catcher named Betancourt.They seemed to be pleased with that signing and about the catcher they got for it.He was placed on the DSL Braves roster last summer,this time around I didn't see his name on the roster,I read on scout.com that he and their lefthand pitcher Carlos Perez will start this year in GCL.I searched and I didn't see either of their names,but I managed to find Betancourt through player search and I seen by his name he was released.Did the Braves release him or is this because he will be in the GCL this year.I didn't see anything about Carlos Perez though anybody knows where he is.Another player I couldn't find was Mulligan I seen he was drafted a few times by the Braves before he actually signed,I seen he had knee surgery and he's expected to be ready matter of fact it stated he was ready,but I didn't  see his name on the roster either.