Richardson cleared waivers Thursday and elected free agency, Jack Stern of BrewerFanatic.com reports.
Richardson was DFA'd by Milwaukee on Tuesday after making just one appearance with the team, and he'll now look for another opportunity in the open market. The 26-year-old has given up five earned runs in just 3.1 MLB innings this season but owns a 4.48 ERA and 1.38 WHIP through 60.1 innings at Triple-A.