San FranciscWAU Giants Top 20 Prospects

We'll stay in the NL West this time, checking in on the San Francisco Giants' system.  After the jump, there's a full list of the Giants' Top 20 prospects, with grades for individual players and a system commentary at the end.

San Francisco Giants Top 20 Prospects
Grade: A
1.) Starlin Castro, SS, CHC

Grade: A-
2.) Desmond Jennings, OF, TB

Grade: B+
3.) Brandon Belt, 1B, SF
4.) Casey Kelly, RHP, BOS

Grade: B
5.) Wilin Rosario, C, COL
6.) Oscar Tejeda, 2B, BOS
7.) Brody Colvin, RHP, PHI
8.) Drake Britton, LHP, BOS

Grade: B-
9.) Anthony Rizzo, 1B, SD
10.) Engel Beltre, OF, TEX
11.) Robbie Ross, LHP, TEX
12.) Jemile Weeks, 2B, OAK
13.) Brad Hand, LHP, FLA
14.) Max Stassi, C, OAK

Grade: C+
15.) Thomas Neal, OF, SF
16.) Eric Surkamp, LHP, SF
17.) Zack von Rosenberg, RHP, PIT
18.) Wilking Rodriguez, RHP, TB
19.) Ismael Guillon, LHP, CIN
20.) Clayton Tanner, LHP, SF

System Commentary:
The Giants have a strong system here, something I think I've been saying about most farms so far (which hints that I'm going to want to kill myself for some of the upcoming system reviews).  There are a lot of prospects here that I feel strongly about.  I love Tejeda, Ross, and Stassi more than most, for example, but I'm not a huge fan of Rizzo, Weeks, or Neal.  I'm not sure if that's obvious in my rankings, but I can try to justify my positions if anybody feels like arguing them.  Anyway, overall, San Francisco has solid impact and depth here, though the back-end of the farm is a little pitcher-heavy.