Batista pitched in the Mets' bullpen this season but has also made 248 career starts. He was designated for assignment Sunday by the Mets and released Thursday. Batista is 1-3 with a 4.82 ERA this season and has pitched 46 2/3 innings, most recently in a spot start Saturday against the Dodgers.
Gonzalez said Batista will bolster the Braves in Triple-A.
"He'll add some depth, just in case," Gonzalez said. "That's a good, experienced arm that doesn't really cost you anything."
Also joining Gwinnett will be veteran right-hander Peter Moylan, who is working his way back from surgery last September to repair a torn right rotator cuff.
Moylan has pitched 10 innings at three levels of the Minor Leagues so far this season. Gonzalez isn't sure how much time Moylan would need in Triple-A before he could rejoin the Braves, but the manager said he would be a boost to the Braves' bullpen.
"If he's pitching like he was before he got hurt, he could really, really help us," Gonzalez said. "But I don't know where he's at, to tell you the truth."