This article doesn't seem to show how the investigations overlap, which was the intent of my question.
I don't need a specific cited source, I was inviting anybody who's got a strong take on the news to make the connection. If they're only currently connected through the mafia, then fair enough.
The overlap is that the FBI was investigating all of them concurrently and chose not to break one story until they could break all of them to avoid tipping anyone off that they were under surveillance. The answer to your question is that the Rozier story is not connected to Billups and Jones but Billups and Jones both participated in the poker games and Jones also profited from leaked injury data. As to how many people are involved in the leaking of injury absences, most of that remains hearsay though Pablo Torre is coming down hard on Ty Lue being a suspect which is interesting considering the LA Clippers are already in trouble for potentially paying their players under the table through middle-man endorsement deals and they're also ground central for "load management" becoming normalized ever since they signed Kawhi in 2019. Lue joined the Clippers as an Assistant Coach in 2019 and took over as Head Coach the following season.