McCalman's Western Force failed to make the Super Rugby finals this season and after their campaign, along with that of the Melbourne Rebels and Queensland Reds, was ended on the weekend, Australian coach Michael Chieka announced 22 players from the three franchises as part of his plans for the upcoming winter of Test rugby.

The 27-year-old recently suffered a fractured cheekbone that will keep him out of the early part of the Rugby Championship, but he should be fit to take part in the latter stages of the tournament as the Wallabies look to build towards September's World Cup.

Meanwhile, former NRL star Karmichael Hunt is among five uncapped players included by Cheika in the squad.

Hunt joins Reds teammate and centre Samu Kerevi, Melbourne Rebels props Paul Alo-Emile and Toby Smith, along with Western Force lock Adam Coleman as the uncapped players in the squad.

Australia begin their Rugby Championship campaign against South Africa on July 18, with Hunt's inclusion coming after a turbulent season off the field for the code-hopper who has a shot at becoming a dual international after playing rugby league for Australia.

In March, the 28-year-old was given a back-dated six-week ban and fined $30,000 by the ARU and QRU after he pleaded guilty to four counts of cocaine possession in the Southport Magistrates Court where he copped a $2500 and escaped a conviction.

The Reds have the strongest representation with 12 players, including veterans Will Genia and James Horwill, while James O'Connor, who suffered a groin injury in Saturday night's loss to NSW, has also been named.

The Rebels and Force have five players apiece with crowd-pleasing winger Nick Cummins among those from the Perth-based side.

Selected players will assemble in Brisbane from June 22 and train out of Ballymore, before their first official camp on July 5 in Caloundra on Queensland's Sunshine Coast.

Additional players from the Brumbies and NSW Waratahs will be confirmed at the end of their respective Super Rugby seasons.

Cheika has also given overseas-based players some extra time off, indicating they will join the squad after the Super Rugby final in three weeks.

The Wallabies mentor has spoken to European-based stars Matt Giteau, George Smith and Drew Mitchell and they have all indicated they are available from the outset of the Rugby Championship.

"They'll be considered for selection for the first game. They've just finished seasons over there - they don't need to come back now. If they were to come back ... if they were selected, they'd be coming back after the Super Rugby final when the full team comes together," Cheika said.

Wallabies train-on squad: Ben McCalman, Paul Alo-Emile, Scott Higginbotham, Luke Jones, Sean McMahon, Toby Smith, Quade Cooper, Saia Faingaa, Will Genia, Liam Gill, James Hanson, James Horwill, Greg Holmes, Karmichael Hunt, Samu Kerevi, James O'Connor, Rob Simmons, James Slipper, Adam Coleman, Nick Cummins, Tetera Faulkner, Matt Hodgson.