SRR and Archie Moore had only 2 world champions in common: Joey Maxim and "Bobo" Olson. Ali and Frazier went one better, with 3 world champs shared: Ellis, Foreman and Foster... but they, in turn, are beaten by Quarry and Bonavena with 4: Patterson, Ali, Ellis and Frazier. How much higher can we go?... and which two boxers can claim the record of having shared the most men from BoxRec's list of world champions?
duran and hearns both fought leonard, hagler, benitez, barkley and cuevas. so that raises the bar to five.
trinidad and de la hoya both fought hopkins, vargas, mayorga, whitaker and camacho. whitaker and camacho both fought trinidad, de la hoya, chavez, haugen and ramirez. holyfield and cooper both fought byrd, bowe, moorer, mercer and foreman. still stuck on five, though.
finally... tyson and mccall both fought lewis, holmes, douglas, bruno, tucker, seldon and orlin norris. seven.
You had a "6" already with DLH/Trinidad... as they both fought Luis Ramon Campas in addition to the 5 you mentioned. But now you have raised the bar to 7 with Tyson/McCall - excellent find:good
ahhh campas with the mini run at 154. still only takes de la hoya/trinidad to six shared, one behind tyson/mccall.