this looks like some positive change:
https://x.com/CodBianconero/status/2046477527934185554
https://www.codicebianconero.com/la-stagione-delle-gambe-sane/
what happened is that the club appointed darren burgess as director of performance, then spalletti bought his own staff including sinatti, and between 25th and 33rd rounds, the club suffered much less muscular injuries and collected more points than during the previous 3 seasons. maybe it's just an easier schedule, maybe it's just an arbitrary period they checked, maybe it's just some luck, who knows. but the trend looks like broken: jj has less muscle injuries than before
btw the article talks a bit about both burgess and sinatti, it might be well worth taking a minute or two to read it