Like Apprenticeship Programs or Artistic Pursuits: Minor League Baseball reporting 2017

nice

https://www.espn.com/mlb/story/_/id/35998626/minor-leaguers-mlb-reach-tentative-deal-historic-1st-cba

4-HR game for Eduardo De Oleo of the Intercounty League's London Majors:

https://lfpress.com/sports/local-sports/london-majors-slugger-rips-four-home-runs-in-one-game#:~:text=De%20Oleo's%20historic%20four%2Dhomer,London%20Free%20Press

Not an important league anymore, but many major leaguers have passed through there, including Fergie Jenkins and Denny McClain.

https://www.theibl.ca/mlb-alumni

(Actually, come to think of it, some of these guys, including Fergie, played there after retirement.)_

on how loaded triple-a teams might fare in the majors (spoiler: not well)

https://blogs.fangraphs.com/terrible-mlb-teams-are-pretty-good-at-baseball