Moll elected to become a free agent Tuesday, Jon Heyman of the New York Post reports.
Moll passed through waivers unclaimed after being booted off the Reds' 40-man roster, and he's opted for free agency rather than accepting an outright assignment. The left-handed reliever has made 65 appearances this season, posting a 4.79 ERA and 56:30 K:BB over 56.1 frames.