This has been speculated about in pieces already: Acquiring Derek Norris and somehow swapping Nolasco for Shields. So would Plouffe, Polanco, Milone Suzuki and Nolasco be enough to get it done? If not, you could swap Duffey for Milone. Plouffe's value isn't that much worse than Norris. Obviously a catcher is worth more, but Plouffe is a more proven offensive player. Norris also has one more year of control. Still, Polanco seems like enough to make up the gap. Suzuki is a take or leave toss in if they want him. Likewise, Shields for Nolasco is not an even trade, but SD is getting rid of more $$. Milone makes up the difference.