Roma have Mehdi Benatia, Kevin Strootman and Juan Iturbe in their US tour squad, but Gervinho will join later.
The Giallorossi will fly out to begin their pre-season tour of USA, including a training camp in Orlando.
Benatia is included in the list despite repeated transfer links to Manchester City and Chelsea.
Strootman also comes along as his recovery from a serious knee ligament injury continues, while Iturbe, Ashley Cole and Salih Ucan are settling in to their new surroundings.
Gervinho and Federico Balzaretti have been given permission by the club to join up with the rest of the squad in a few days.
Douglas Maicon and Vasilis Torosidis are still on their post-World Cup vacation.
Roma: Balzaretti, Balasa, Benatia, Borriello, Calabresi, Capradossi, Castan, Cole, De Rossi, De Sanctis, Destro, Emanuelson, Florenzi, Gervinho, Golubovic, Iturbe, Keita, Ljajic, Lobont, Nainggolan, Paredes, Pettinari, Pjanic, Romagnoli, Sanabria, Skorupski, Somma, Strootman, Svedkauskas, Totti, Ucan