I've always thought Sporting Goods was Ralph Pierce only because he used to meet Sporting Goods on the south side at a supper club and the south side being Ralph's area. Plus in his book he says Sporting Goods died I believe in the 1970's which is when Ralph died. Bill also talks about how well he got along with Ralph and describing Sporting Goods he mentions that he is mentioned in the book "Man Against the Mob" as a high ranking member of OC which Ralph was. That is just my theory
I believe Romano to be either Butch Blasi who Bill even refers to him in the book by saying "Blasi and i were not friends but became pretty close" or Romano could be Chuckie English because at one point Bill says English flew to Arizona to meet with Bill to discuss Rocky Infelise's drug charge from the 1960's. Those are just my thoughts on the matter. I've always wondered who his 2 top informants were.