After watching Mike Bolsinger struggle through his six starts, none of which made it a full six innings (and overall compiled a 1-4 record), the Dodgers realized they just can't get enough out of his starts, and optioned him (hoping Bolsinger would never let me down again), in order to call up Nick Tepesch.
Tepesch's mode involves not being intimidated by hitters and challenging them often, with a four pitch mix of fastball, cutter/slider, curveball and changeup; ideally, Tepsech would get the balance right.
Though not known to be overpowering while with the Rangers, where he posted a 9-17 record / 4.