I talked a little bit about Baltimore Orioles pitching prospect Chris Tillman yesterday. Tillman’s Double-A rotation mate David Hernandez is another interesting prospect in the system and a survey by Baseball America recently ranked the pitcher’s out-pitch as the best breaking ball in the Eastern League.

Hernandez was drafted in the 16th round of the 2005 draft out of Cosumnes River Junior College. It was the third time that he had been drafted, including in the 29th round of the 2003 draft by Colorado and the 34th round of the 2004 draft by Arizona.

Along with his breaking ball – which has been called both a curveball and a slider – Hernandez also has a low-90s fastball that can touch the mid-90s and a change-up. He has battled his command a bit (including a career 3.88 BB/9) but Hernandez, 23, has also always been able to rack up the strikeouts (career 10.17 K/9).

After spending his first three pro seasons in A-ball, Hernandez has taken to Double-A like a fish to water. He currently has allowed 102 hits in 129 innings pitched, good for a .217 average against. He also has allowed 64 walks and struck out 156 batters. Hernandez is also an extreme flyball pitcher. If you combine that fact with the high number of walks this season it’s clear that the pitcher still has work to do, but it shouldn’t be long before Hernandez receives a taste of Major League Baseball.