What's good enough?
Basically, most teams, even playoff teams, have 3 core SPs and rotate 3-4 guys through the last two spots year to year.
Even if you put together 4 "aces," between injury and salary, how long is that sustainable?
Nola if he can stay healthy has #1 stuff, needs some refinement, but when he's hitting his spots with that two seamer and the curve and changeup are working, he's unhittable.
Pivetta has top 3 potential, the key like most young pitchers is command and secondary stuff, but FB plays faster due to movement.
Right now they don't have a viable candidate for the third core pitcher, Velasquez and Eflin have that kind of stuff but both have a lot of questions.
Eickhoff, Lively, Leiter have back of the rotation stuff, they've all shown they can get ML hitters out, but they have smaller margins of error. But they have FBs in the 91-92 range, which is more than sufficient. That's the depth you need for a 162 game season. We could use a couple more guys like this in Lehigh next year as insurance.
Eshelman is an unknown, does he have enough velocity to make his command work? He's got much better command than Cloyd, who dominated AAA but was exposed in the majors.
Leibrandt probably doesn't have enough velocity to make it, Thompson and Appel seem to be imploding, though Thompson is young enough to turn it around.
Anderson, El Garcia and Irvin are probably 2 years away, but all have good enough stuff to be viable ML starter candidates.