Eflin actually had a very good season, outside of July and I have to wonder how much of that was Young insisting on throwing more 4 seamers. And he should continue to fill out, strengthen his legs and refine his stuff. There's a lot to work with there. Throwing more changeups today, a key to his future success.
Pivetta needs to embrace the bullpen role, he's throwing 95-97 out of the pen which makes his FB harder to hit, and he just needs to work on the knuckle curve to be an effective setup man. And he has the strength to go multiple innings.