I think Matt Carpenter has the ability to kill any chance of Arenado going to St. Louis. The Cardinals would almost certainly have to dump on contract on the Rockies, and Carpenter would be the obvious choice. The Cardinals have stated that they will not put Carpenter back in the outfield, and with Goldschimdt at 1B and Arenado at 3B, that would leave 2B as the only option for Carpenter and I don't think there is any chance they'd put him there. Carpenter now has no-trade protection, and he could easily demand the 2022 be made a guaranteed year which would make him as untradeable as Kyle Seager. There is always a chance that Carpenter would agree to a trade to Colorado and maybe just demand a reassignment bonus of a few million to waive his no-trade, but Carpenter has all the power here and will be the one who makes the call on where he plays. Have to wonder how much of the Rockies motivation to move Arenado comes from the opt-out? Maybe they are comfortable with the average annual value of the deal, but think they will get outbid for him if he does opt-out...and if that's the case then trade him now and take what you can get. If so, would the Rockies be OK with the 5 years, 110 million left on Goldschmidt's deal (22 million per season, far less than Arenado and no opt-out to worry about, St. Louis obviously picks up all remaining signing bonus payments)? Goldschimdt was by no means bad but probably was considered a slight disappointment in St. Louis last year (.821 OPS). That would put Carpenter at 1B and Arenado at 3B for the Cardinals. Daniel Murphy is basically on a 1 year deal (mutual option for 2021), but he could get kicked to 3B in Colorado. Obviously a long-shot, but it should would be a blockbuster if Arenado headed to St. Louis and Goldschmidt plus a few other pieces (including Liberatore) headed to Colorado. I would imagine there probably wouldn't be too many Brewer fans crying about this. Arenado is the better all-around "value" player, but very few hitters have beat up Brewer pitching like Goldschimdt. 1.097 career OPS against Brewer pitching.