The Yankees got Gleyber Torres, Billy McKinney, Rashad Crawford and Adam Warren from the Cubs for a 2 month rental of Chapman. You seriously are asking this?
You're not getting that.
Martinez brought back Dawel Lugo, Sergio Alcantara, and Jose King. None of them are even remotely high prospects.
You think Chapman for 2 months commands a better return than Harper for a full season? Not to mention if you trade for Harper before the season you can make a QO and get a compensation pick, which the Cubs couldn't do with Chapman. Come on.
Yes. Again, what team is one bat away from being a WS favorite and is willing to give up what it takes to get him? The Cubs were a closer away from being a WS champion and they made the move.
Who are you trading Harper for and what are you getting in return? Name names. Don't tell me "oh Chapman got this" That was at the deadline and back end relievers were artificially inflated at the time. Wade Davis cost less. David Robertson and Tommy Kahnle went for a lot less. The 2016 MLB trade deadline was an anomaly.
So like I said, start naming names. Would you give up Robles, Fedde, and Goodwin for one season of Mike Trout or JD Martinez?