These threads are most fun when you get to find out what happened...
I promoted him just after the All-Star break and ending up finishing 83-79, winning the division by 2 games. So, yes, it was worth it. I lost my first playoff series, but at least I gave my team the chance.
His final stat line:
16G, 113IP, 2.95 ERA, 1.17 WHIP, .243/.291/.334 , 91-26 K-BB
It will be fun to see him perform over a full season in a stacked rotation.