They didn't show up on the Fangraphs list I was using because I hadn't set the "plate appearance" screen to zero. Anyway, Napoli had a WAR of 5.6 last year and Sandoval at 5.5, so let's take a look at how they rated as prospects. I did Napoli in a separate post earlier this afternoon. Here's Sandoval.
Pablo Sandoval: The Venezuelan Sandoval made his North American debut for the San Francisco Giants in the Arizona Rookie League in 2004, hitting .266/.287/.373 in 46 games, with poor plate discipline, although he was just 17. He wasn't on my radar at that point. That changed after he hit .330/.383/.425 for Salem-Keizer in 2005. I gave him a Grade B- in the 2006 book, noting his ability to hit for average. I pointed out the lack of walks, but also noted the low strikeout rate, a good marker.
Sandoval struggled in 2006, hitting .265/.309/.322 in 117 games for Augusta in the Sally League. The extreme lack of power and some negative scouting reports I had on him knocked him back to a Grade C, and I ended up cutting him from the book to save space. He rebounded with a .287/.312/.476 mark for San Jose in 2007, which got him back in the book.
There were significant questions about his defense at the time. . .was he a catcher? A first baseman? A third baseman? I rated him a Grade C but in retrospect that decision was wrong and I think he deserved at least a C+ and probably a B- given his hitting at San Jose, even with the defensive issues.
Sandoval had a breakout in 2008, hitting .350/.394/.578 between San Jose (68 games) and Double-A Connecticut (44 games), then making his major league debut and hitting .345/.357/.490 for the Giants. He exceeded rookie qualifications with 145 at-bats, so he wasn't in the '09 book. He would have at least been a Grade B+ at that point.
Looking over this, in retrospect Sandoval's Grade C rating entering 2008 was too low, even with the information available at the time. I didn't give enough credence to his age, as well as some statistical markers of a plausible breakout. Even with positional concerns, he should have at least been a C+.