Gotta think bigger picture…
Rick Dempsey for Danny Walton.
Graig Nettles (and Dean Chance…who only had one good year left, plus two others), for one year of Luis Tiant, and Stan Williams.
And they outright released Jim Kaat and effectively released Luis Tiant. So, they essentially traded them for nothing at a point when they had a collective nearly 250 major-league wins left in them.