Still, those Bagwell/Andersen disasters are the exception, not the rule -- it's much harder to project the fates of minor-league prospects than you might think.
I guess thats the same thing as :
"There's no such thing as a pitching prospect" (TNSTAAPP, for short) is actually a shorthand way of expressing the idea that minor-league pitchers are an unpredictable, unreliable subset of baseball players. The concept isn't mine, although I'm probably the most dogmatic BPer on the subject. Gary Huckabay was the first to use the phrase; some Googling turned up credit to him in the late 1990s on rec.sport.baseball.