So it seems like now's a good time to remind people that Galarraga was in fact a pretty highly regarded prospect and a key piece of that trade. No, I didn't expect him to throw a perfect game, and yes he was bad last year and didn't even make the Tigers rotation out of spring training. But it's wrong to say Galarraga was not a "real" prospect.
Here's the Baseball America write-up on him from the 2006 Prospect Handbook, in which Galarraga was ranked #5, right behind Ian Desmond:
Background: Because of 2002 Tommy John surgery, Galarraga pitched just 54 innings in his first three seasons in the United States. He stayed healthier once he began to take baseball more seriously in 2004, and he had his best year yet in 2005, earning a berth in the Futures Game and a promotion to Double-A.
Strengths: Galarraga has a lively 92-94 mph sinker and a hard, sharp slider that he can throw for strikes and use as an out pitch. He has a strong, athletic frame and attacks hitters from a three-quarters arm slot. He’s very competitive and shows a mean streak.
Weaknesses: For Galarraga to stick as a starter, he needs to complement his two plus offerings with a third pitch. He must continue to develop his changeup, which shows some promise. He doesn’t walk many batters but sometimes misses his spots inside the zone.
The Future: Galarraga can be a No. 3 starter if his changeup emerges. If that doesn’t work out, he could be a powerful bullpen arm. He figures to start 2006 back at Harrisburg but could earn a big league promotion late in 2006.