Former Crusader in England squad
England face the Barbarians on May 28 before playing two Tests against Argentina in June.
Jones included 15 uncapped players in his 31-man squad for the Argentina tour with several attending next week's training camp.
Former Crusaders scrumhalf Willi Heinz has been included in the 26-mam training squad.
Heinz played 56 times for the seven-time Super Rugby champions before moving to England to join Gloucester in 2015.
England squad:
Forwards: Josh Beaumont (Sale Sharks), Rob Buchanan (Harlequins), Will Collier (Harlequins), Ben Curry (Sale Sharks), Tom Curry (Sale Sharks), Tom Ellis (Bath), Charlie Ewels (Bath), Jamal Ford-Robinson (Bristol) , Ross Harrison (Sale Sharks), Chris Robshaw (Harlequins), Nick Schonert (Worcester Warriors), Jack Singleton (Worcester Warriors), Will Spencer (Worcester Warriors), Mark Wilson (Newcastle Falcons).
Backs: Mike Brown (Harlequins), Danny Care (Harlequins), George Ford (Bath), Mike Haley (Sale Sharks), Willi Heinz (Gloucester), Sam James (Sale Sharks), Joe Marchant (Harlequins), Jonny May (Gloucester), Ryan Mills (Worcester Warriors), Denny Solomona (Sale Sharks), Jason Woodward (Bristol), Marland Yarde (Harlequins).
