Let me preface this by saying I understand the Reds' rationale for starting him in the bullpen this year. Until Nick Masset gets back into the pen, Chapman fills an important void. It's mutually beneficial as this allows Chapman to keep his innings down early in the year so they can stretch him out as a starter at the end of the year. I'd rather he pitch meaningful innings later than earlier.
That said, watching him pitch this year effortlessly makes me excited to see him in the rotation, finally. His command is beginning to match his stuff.
Fifteen strikeouts and no walks so far? Are you kidding me?
My best friend made a comparison today that I think is 100% on the money: Randy Johnson.
You watch Chapman's delivery and it comes across multiple planes and at a tough, 3/4 delivery like Johnson. Like the big unit, he comes at you with a fastball at nearly 100 and a devastating slider. Now, in his prime, Randy also had a changeup and could hit locations really well. However, while Chapman isn't 6-11, I think we're seeing his ceiling so far this year pitching out of the wind-up.
I don't want to get too literal in comparing him to R.J., but I see some of the same traits -- delivery, repertoire, etc. -- that Johnson possessed. Regardless, the important thing is, he's exciting to watch. I hope the Reds make the most of his talent going forward.