Hamilton has allowed four runs with a 4:3 K:BB over 4.2 innings in low-leverage appearances out of the Atlanta bullpen this season. The 31-year-old accepted a previous outright assignment to Triple-A, so he could remain in the organization again if he passes through waivers.

Hamilton was knocked around for three runs over an inning of work in his lone appearance for Atlanta earlier this season. He's been much better at Gwinnett, however, with a 3.18 ERA and 28:6 K:BB over 22.2 innings. Hamilton will give the club a fresh bullpen arm.