Updated: June 04, 2014, 02:19 PM EST

Top 100 MLB draft prospects

Prep lefty Brady Aiken keeps the No. 1 spot on Keith Law's final board

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These rankings never feel final, and probably wouldn't stop changing if I wasn't forced to commit to one by the fact the draft is coming up in a matter of hours. I've had a few significant changes here based on two major variables -- pitchers getting healthy or hurt, and late reports from area scouts on players who finished strongly or whom I just plain underrated the last time around.

That means big moves up for Luis Ortiz, who's now healthy, and prep arms Trey Supak and Bryce Montes de Oca, whose deliveries are among my favorites in the draft. It also means drops for pitchers who've gotten hurt since the last ranking, including Erick Fedde (Tommy John surgery) and Brandon Finnegan (shoulder soreness).

As always, I use the 20-80 grading scale in these comments to avoid saying "average" and "above average" a thousand times across 100 player comments. On that scale, a grade of 50 equals major league average, 55 is above average, 60 is plus, 45 is fringy or below average and so on. Giancarlo Stanton has 80 raw power. David Ortiz has 20 speed. Carlos Gomez is an 80 defender. An average fastball for a right-hander is 90-92 mph, with 1-2 mph off for a lefty.