Jason Parks did a rundown of the top RHP prospects in baseball today over on BP. I'm not the least bit surprised at his pick for #1. (The italics toward the bottom are mine.)
Leader of the Pack (Present): Shelby Miller
The case for: First and foremost, Shelby Miller is a Texan, and therefore already has an advantage over his competition for this title. I’m open about my bias. See the second rule.
From a scouting perspective, Miller has everything I look for in a future top-of-the-rotation arm. With prototypical size (6-foot-3 195 pounds) and room for additional strength, Miller has the body and the delivery to log innings and maintain his stuff deep into games. His fastball is a legit plus pitch, and can show plus-plus velocity, as he touches the upper 90s at times. The curveball is another above-average offering, flashing plus more than it flashes the potential to be plus, with excellent depth to the break and a tight spin. As with most young power pitchers, Miller’s changeup was underdeveloped in relation to his other offerings when he was drafted, but it has quickly emerged as another plus-potential pitch. It plays well off his fastball with good weight and some arm-side fading action.
With his frame, his tenacity, his smooth delivery, his being a Texan, his power arsenal that could/should leave him with three plus pitches when he reaches maturity, and the overall command that seems to gain refinement by the outing, Miller is the present leader of the pack of right-handed pitchers, and one could make a very convincing case that he is the top prospect in the game itself. After all, legit aces are baseball’s most precious commodities, and Miller has all the characteristics necessary to fulfill this projection.
The case against: I can’t think of one.