This is an important reading about average age of Minor Leagues.
https://sabr.org/research/truth-minor-league-class-structure-case-reclassification-minors
Espinoza Trade was a smart move.
This year we got rid of 2 DSL kids for Cashner, everybody said no big deal. We should be watching Prado just as much as Espinoza.
Espinosa was 17 years old, typical for DSL kids. He was facing kids his age, like High School.
As soon as he hit Single A, and started facing kids 4 years older, he struggled. Struggled in both Single A leagues. Special Kids don't struggle, like Urias of the Dodgers. They dominate kids older too. Which is good to gage a kid. Now, you don't want to get rid of him. Urias was 16 when he started his Professional Career, 19 he was in the Majors. Reason, he dominated kids older then him, in the Minors. That's why the Dodgers didn't get rid of him.
What smart GM's would never do is Trade for a kid that has small sample size in Pitching in a Rookie Leagues numbers to kids his age, for a proven young Major League Pitcher, with team control. It was a smart move. He used the Former Sox executive who signed him, to his advantage.
Please don't bring up Hindsight, if your using it too.
Edit: Durran, did fantastic, till he faced Players that were his equal in talent, from here on in, its going to be work for him.