The Orioles recalled Wells from Triple-A Norfolk on Wednesday.
With the roster expanding from 26 to 28 men Wednesday, Baltimore elected to use its two open spots on a pair of bullpen arms in the left-handed Wells and the right-handed Dusten Knight. Wells has previously made six appearances (three starts) for Baltimore this season, covering 18.2 innings while allowing 16 earned runs on 27 hits and nine walks.