The younger Mazzone you see is Anthony, who is Steve and Sonnys nephew. He is a real estate agent and not involved and is only around a lot because they are his family and very close. Very very nice kid....absolutely not involved. The other you are referring too with Joe a lot is Mikey Emma. Mousie is his Uncle and yeah he is with Dom a lot but they friends since kids. He just got a new BMW and is always riding around.