Opening Day rotation (barring injuries) ought to be:
Sale, Paxton, Kluber, Pivetta, Bello. Whitlock and Houck start the year in the bullpen. I agree with
@LogansDad - Bello is ready. He probably can only throw about 160-170 innings max, and I don't want them wasting those innings in AAA. He's good enough for the majors. Yes there may be some bumps. Oh well.
Now, what to expect from these guys?
Sale
* Best-case scenario: He's healthy all year and gives the Sox 175 innings of an ERA in the high 2's or low 3's, with more than 10 k/9.
* Worse-case scenario: He gets hurt again and gives them about 30 innings of an ERA in the 4's.
* What I think will happen: He gives the Sox about 140 innings of an ERA in the mid 3's, which would be just dandy.
Paxton
* Best-case scenario: He's healthy all year and gives the Sox about 160 innings of an ERA in the mid 3's.
* Worst-case scenario: He gets hurt again and literally gives them nothing.
* What I think will happen: He gives the Sox about 120 innings of an ERA in the high 3's, which would also be just dandy.
Kluber
* Best-case scenario: He has one more good year in him and befuddles AL hitters to the tune of an ERA in the high 3's, giving the Sox about 175 innings.
* Worst-case scenario: He struggles as his velocity dips even more and his control suffers, and he gets absolutely lit up to the tune of a high 5's ERA.
* What I think will happen: He gives the Sox about 140 innings of mediocre results, with an ERA in the mid 4's, having some good moments but a bunch of bad ones too.
Pivetta
* Best-case scenario: He puts it all together and gives the Sox 200+ innings of low 3's ERA ball and is the backbone of the rotation.
* Worst-case scenario: He actually has to deal with some injuries and struggles, giving the Sox about 140 innings of low 5's ERA.
* What I think will happen: He is solid all year long. Not great, but not bad, and is pretty healthy. Write him down for 175 innings and an ERA in the low 4's.
Bello
* Best-case scenario: He emerges as one of the bright young pitching stars in the game and stays healthy. 165 innings at a low 3's ERA.
* Worst-case scenario: He has to start in AAA or struggles in MLB early and gets demoted. Can't stop walking people. Gives the Sox about 75 innings at an ERA around 5.
* What I think will happen: He starts the year in AAA but dominates there and by May the Sox have him up for good. He gives them about 130 innings in the high 3's and we are seeing the beginning of a tremendous career.
Now, if the worst-case scenarios happen, this team is obviously screwed. If the best-case scenario happens, they'll absolutely go to the playoffs. Neither of those will likely happen in full. I expect at least one of these guys to get their best-case scenario, and one of them to get their worst-case scenario. But if that happens, and the average is in the range of my "what I think will happen" scenarios, then the rotation should be pretty decent. Not great, not anywhere near elite, but pretty decent. Good enough to keep them in the playoff race if the offense shows up.