This happens all the time with low to mid level prospects. They get called up when they're fairly young, get some AB's, do decently and people assume they are going to improve and that they have a good player on their hands. Look at Victor Diaz for the Mets last year(who's hit in the minors, unlike Melky) he came in and amassed a decent number of AB's and was significantly better then Melky has been. This year he can't beat out Xavier Nady, is back in AAA and stinking it up there.
You're not serious, are you? Melky was nowhere close to being the top prospect in baseball, he was barely a top 5 prospect in the Yankee organization.
no melky wasn't a top prospect, but he has certainly developed into one. he also was not scouted correctly. vicotr martinez is a terrible comparison. if you look at melk's strengths, you can see why the organization is excited about him. he's got a strong and accurate arm ( i believe the initial scouting report was a "plus" arm, which is prob an understatement) and he's an excellent two strike hitter. he's also shown that he can take the ball the other way, and flashed a power stroke at times. he's also faster than he looks-- has potential to steal 30 bases if he's taught some technique. he is also not a defensive liability at all, in fact, i think he's better than matsui out there by a long shot. melky might not be a superstar, but for a 21 year old kid, you have to say hes had quite an impressive rookie campaign. the fact is, he's still pretty raw, but he really has been a shot in the arm for this yankee squad.
