We are sort of in a bit of a lull until Spring Training starts, and arguing gets tiresome, so let's all share the hopes that were dashed over the years for Cubs prospects. I'm going to give my top 3. You don't have to limit it to prospects who got a cup of coffee in MLB.
#1- Matt Murton- He came with Nomar in the great Hendry trade that didn't work (but one of the best NSBB threads ever). I still believe he never got a full shot with the Cubs. He was a line-drive hitter with good patience and little power, who could only play LF. Anyway, he went on to have a great career in Japan.
#2- Chris Morel - What a wonderful story, and apparently a great kid. He couldn't play defense and couldn't hit enough to stick as a DH. Now he's in Japan.
#3- Arismendy Alcántara - I was hoping for this kid hard. He had all the physical tools, but couldn't put them together.
I'm sure there are others, but those three really stand out to me.