The Cubs re-signed Wantz to a minor-league contract Thursday.
Wantz elected free agency earlier this week after being removed from the Cubs' 40-man roster, but he's returned to the organization on a new deal. The right-handed reliever has allowed six runs over 3.2 innings in the majors this season and holds a 5.88 ERA and 51:27 K:BB across 49 frames at the Triple-A level.