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To answer this question from jfranco77,

Can we get a follow-up looking at all the teams? Pretty please? Just some kind of ranking from 1-30 of their 90% FRA minus their 10% FRA?

on this article, by Matthew Trueblood,

Because the thing is, the Indians could have one of the best starting rotations in baseball—or they could be a nightmare.
here are a few fast facts about volatility. There will be little in the way of words, because these facts are too fast for words.

All 30 teams, ranked by "volatility", in which volatility is defined simply as the difference between the 90th percentile ERA and the 10th percentile ERA of the top five starters. It does not include the volatility introduced by injury risk, but rather focuses on performance outcomes. Averaged, but not weighted, among each staff:

Difference Team
1.77 WAS
1.80 LAN
1.81 SFN
1.83 CHN
1.83 MIA
1.89 ATL
1.89 NYN
1.89 SDN
1.92 ANA
1.92 MIL
1.93 PHI
1.95 SEA
1.98 BAL
1.98 CIN
1.98 SLN
1.99 PIT
2.01 CHA
2.02 HOU
2.02 TBA
2.03 KCA
2.05 BOS
2.05 DET
2.05 MIN
2.1 ARI
2.11 TEX
2.13 NYA
2.13 OAK
2.14 CLE
2.14 TOR
2.26 COL

And my super-fast analysis of these facts: Cubs. Indians and Blue Jays. Marlins. Royals.

The most volatile individual pitchers, among these 150 starters:

All five Indians starters are more volatile than the median pitcher.

and the least:

Fast analysis: Kershaw.

Thank you for reading

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"jfranco77" made me Google what Julio Franco was up to. Apparently he's playing baseball. Because of course.
Awesome! Thank you very much!