Last winter, Yasiel Puig was heading into his last season of team control before hitting free agency. The Dodgers ended up trading him (along with Matt Kemp, Alex Wood and Kyle Farmer) to the Reds for Jeter Downs and Josiah Gray (and Homer Bailey, I guess).
It really isn’t about who won or lost the trade the Dodgers won, btw), but the Dodgers traded all three of them before their final year of free agency.