Getty ImagesReggie SmithReading Evan Bladh's recent post on Mike Piazza at Opinion of Kingman's Performance, I got to wondering about the Mike Piazzas of every team in baseball — which players were the most valuable to both the Dodgers and another team.So I put together this chart of what I thought might be the best. Keep in mind that I tried as hard as possible to avoid technicalities — if the player wasn't significant to both teams, I wasn't interested.