The Italian giants have been on the lookout for a new striker since selling Zlatan Ibrahimovic to Paris Saint-Germain last month and Borriello is considered to be an option.
The 30-year-old hitman spent two and a half seasons at the San Siro before being initially loaned and then sold on a permanent basis to the Giallorossi in 2011.
However, he is now considered surplus to requirements at Trigoria and a move back to Milan is on the cards.
Meanwhile, Cassano has been linked with a departure from the Rossoneri, with Sampdoria touted as a possible destination for the Italy international.
Roma's sporting director, Walter Sabatini, did little to quell the speculation when admitting on Tuesday that he "received a phone call about Cassano yes".“But I would not call it an offer from Milan. A small draft in the market, yes, probably from a third party. Our priority is a central defender.
"But an exchange involving Milan and Borriello seems unlikely," he concluded.