The Italy international joined the Rossoneri from city rivals Inter Milan last summer.
"I have a good relationship with Juventus director general Beppe Marotta because we have known each other for a long time," Pazzini told La Gazzetta dello Sport.
"There were no direct conversations, but, in a few transfer sessions, we were close even if no deal was eventually done.
"Napoli? There was something with them last summer, as well as a few years earlier."
Pazzini has scored 12 goals in 22 Serie A appearances so far this season.