This is where I differ from you. We’re seeing more pitchers maintain their elite velocity throughout their career, a la Aroldis Chapman, Zach Wheeler, Justin Verlander, etc. We worry about a future arm injury but he’s gone unscathed so far in his MLB career.
Duran’s velocity is his natural ability. Whereas Jax had to work extremely hard to go from a 91 MPH sinker ball prospect to what he is today. That’s why I prefer keeping Duran and trading Jax.