I don't get this for the Giants. I know their 1st base need and I know their system is great but I thought Barnes had more value than that and was set to rise up prospect rankings in the offseason.

According to Ed Price of AOL Fanhouse, the Giants have acquired first baseman Ryan Garko from the Indians for LHP Scott Barnes and a PTBNL.
The Giants have been eyeing a first baseman to replace Travis Ishikawa, and Garko is a nice fit. The 28-year old is batting .285/.362/.464 this season with 11 home runs and 39 RBI. He's a force against left-handed pitchers and is under team control through 2012. Barnes, 21, has gone 12-3 with a 2.85 ERA and a 99/29 K/BB ratio in 18 starts (99 innings) for Single-A San Jose. Jul. 27 - 9:25 pm et