If you look at the Johan Santana trade, the Twins have now received Jon Rauch, JJ Hardy and Delios Guerra for Santana. I thought it would be interesting to see what other players the Twins have in their system that are the legacies of earlier players.
Nick Punto - Punto was part of the Eric Milton trade. Milton in turn was part of the deal that sent Chuck Knoblauch to New York.
Delmon Young, Brendan Harris, Jason Pridie - Received in trade that included Jason Bartlett, who in turn was received for Brian Buchanan who in turn was part of the deal that sent Chuck Knoblauch to New York
Brian Duensing - 2005 Draft pick from Nationals for Cristian Guzman who in turn was part of the deal that sent Chuck Knoblauch to New York.
Alexi Casilla - Trade for JC Romero
Joe Nathan, Boof Bonser, Francisco Liriano - AJ Pierzynski
Glen Perkins - 2004 Draft pick from Mariners for Eddie Guardado
Of course there are still other minor league players that were received as compensation draft picks. But I think the list above gives a pretty good idea of how long a trade can resonate through an organization. Last spring the Twind released minor league pitcher Zach Ward, who by one measure was the last legacy of the Frank Viola deal in the 1980's. He came to the Twins in trade for Rick Aguilera (although Aguilera had been signed as a free agent after being traded to Boston.) We can hope the Santana deal resonates as long.