The Angels recalled Wantz from Triple-A Salt Lake on Saturday.
Wantz has spent the entire season in Triple-A, though he missed nearly two months due to a right forearm injury. Since returning from the IL, he's allowed nine runs (eight earned) in just six innings over three appearances. Despite his poor performance, he'll join the Halos as a replacement for Zach Plesac, who was optioned to Triple-A in a corresponding move. Six of Wantz's seven appearances in the minors this season have been as a starter, but he'll likely be deployed as a multi-inning reliever for the Angels, at least initially.