Bethancourt was given the chance to take over as Atlanta's starting catcher before veteran A.J. Pierzynski won the job. The 23-year-old Bethancourt hit .198 in 101 at-bats over 29 games before he was optioned to Gwinnett on June 15.
The 26-year-old Marimon is 0-1 with a 7.71 ERA in six games this season. He was optioned to Gwinnett on June 28.
The 33-year-old Aardsma, who was signed by Atlanta on June 6, was 1-1 with a 4.70 ERA in 33 games. Perez hit .269 in 47 games.