He's rehabbing to build up his pitch count so he can slot into the rotation. Hard to do that from the bullpen.Wait can someone explain why they didn't just let him "Rehab" with the big club? He has to be better than their end of the pen options.
He's also now done after 4 innings and exactly 75 pitches: 6 hits, 1 R, 6 K, 1 BB. Very encouraging.