In many, many threads we see the ol' Anthony Calvillo card played. On a TiCats card table, this card is played to prove we shouldn't give up on a player too quickly, lest he goes on to fame and glory on another team.
I wonder how many other teams have an 'Anthony Calvillo' under the table. How many other teams traded away a player or prospect who turned out to be a Hall Of Famer?
As an ex-NHL fan, one name quickly comes to mind. The California Golden Seals traded their 1971 first round draft pick to the Montreal Canadiens for some player nobody remembers (except his immediate family I assume). The draft pick turned out to be Guy Lafleur.
In baseball, the BoSox selling Babe Ruth haunted them for an extended period of time.
For our discussion, how about we limit it to a player developed by the original team, spent a couple years as a starter, traded or released, who then went on to long term success on his next team. Just like Anthony Calvillo did.