Tromp cleared waivers Saturday and elected free agency, Barrett Sallee of 680 The Fan Atlanta reports.
Atlanta DFA'd Tromp on Thursday, and instead of accepting an outright assignment to Triple-A Gwinnett, the 31-year-old will test his value in free agency. He's slashed just .169/.253/.325 across 87 plate appearances in the minors this season, so he will almost certainly have to settle for another minor-league deal.