Costanzo, 28, made his major league debut earlier this season and has appeared in 17 games total with the Reds. Over his 18 at-bats, he only collected a single hit.
Costanzo has spent a majority of the season with the Reds’ Triple-A affiliate, but he’s also seen time at the Double-A level. Over his combined 266 at-bats, he’s hit at a clip of .274/.377/.459 with seventeen doubles and ten home runs.
Brackman did not appear in a game with Cincinnati prior to being designated. The former top prospect has spent most of the season with the Reds’ High-A affiliate, posting an ERA of 5.08 with 6.7 K/9 and 4.8 BB/9 over his nineteen appearances, including three starts.