At the same time only Wagner showed anything close to what Stewart has shown at a high level, and he did that as a reliever, not as a starter. Gruler never made it anywhere and was all of 19 before he was toast due to injuries. Howington made it to AA, struggled mightily with his control, then got hurt. Stewart has a 1.67 ERA in A+, AA and AAA this year with two plus pitches and control. Its not quite the same comparison. Stewart is an unproven, but he isn't exactly an unknown. He has gotten it done in outstanding fashion all the way up the ladder so far with both stuff and control. The Reds haven't had many guys like that in the last 40 years. Cueto is the only guy in that same sentence from the last 25.