Duncan was acquired
by the Diamondbacks on Friday in exchange for Phil Gosselin.
Although Duncan doesn't carry the high-profile prospect status that some of the other Pirates minor leaguers possess, he still proved to be a viable asset at Triple-A Indianapolis in 2016 at the age of 24. He made 20 starts and notched a 2.33 ERA to go with a 1.21 WHIP. While his strikeout rate (7.4 K/9) is far from eye-popping, he has shown solid control with an ability to keep the ball in the yard, which will be an important trait out in the desert. The Diamondbacks also announced
that Duncan received an invite to major league spring training.