I think it's a question of what you could get for him in your respective leagues. Sure, you could trade VMart, but if the most you can get is say Placido Polanco, maybe it's just better to drop him? Course I think it would be better to just stash him on the bench, but not every team can do that..
...Boston papers now and then suffer a sharp flurry of arithmetic on this score; indeed, for Williams to have distributed all his hits so they did nobody else any good would constitute a feat of placement unparalleled in the annals of selfishness. -Updike