John Sickles: Top Prospects - Seattle Mariners

1) Taijuan Walker, RHP, Grade A-: A future number one starter, if he stays healthy and builds on what he did in 2011. Combination of stuff, athleticism, and better-than-expected polish makes him special in my view.

2) Danny Hultzen, LHP, Grade A-: Less risk than Walker, but upside not quite as high. He still projects as a number two starter for me and he won't need long in the minors.

3) James Paxton, LHP, Grade B+: Borderline A-. Like Hultzen, he can be a number two starter with his plus stuff from the left side, although his command isn't as refined as Hultzen's. Can you imagine if the Blue Jays had signed Paxton in 2009? How good would that system look if they had another ace-quality arm?

http://www.minorleagueball.com/2011/12/9/2619595/seattle-mariners-top-20-prospects-for-2012