Wagner, 26, was claimed off waivers last fall. He had reached the big leagues only briefly in each of the past two seasons, but had largely thrown well in the upper minors.
Thus far, however, Wagner has struggled at Triple-A Round Rock. Through 14 innings over three starts, he has allowed a dozen earned runs on 19 hits with as many walks as strikeouts (eight apiece). It seems he’ll continue to work from the rotation there after clearing waivers.