6 years vs 3 months. Let that sink in.
Delgado was ATL's 3rd best prospect and he was going to be under team control until he was 28, making roughly ~500k/year. He could easily/obviously develop into a solid starter between now and 2018.
It's not mortgaging the future, per se, but Atlanta is sure as **** doubling down on this year. This ain't as bad as Texeira, but the Cubs got a great deal.