1
The guys at proballnw.com have their own top 20s: http://www.proballnw.com/02-2011/top-20-seattle-mariners-prospects-for-2...
And they have a very cool link to a roundup of major lists: http://farfromport.com/2011/01/26/mariners-prospecting-2011/
Looks like Taijuan is almost a consensus #4.