Croker's late missed penalty goal from almost in front of the sticks, which cost the Raiders any chance of forcing golden point in their 26-24 semi-final loss to Wests Tigers, was a harsh end to a breakout year.
All Raiders players and officials refused to attribute any blame to the Goulburn junior for the loss and would applaud his well-deserved selection in the Australian VB Kangaroos squad alongside team-mates Josh Dugan, Tom Learoyd-Lahrs, Joel Monaghan and David Shillington.
Four Penrith players were also added following their loss to the Roosters on Saturday night - Petero Civoniceva, Michael Gordon, Michael Jennings, Luke Lewis.
Raiders co-captain Terry Campese and Penrith's Trent Waterhouse were not considered for selection in the train-on squad due to injury.
Australian VB Kangaroos Four Nations train-on squad as of today:
Brisbane Broncos: Darren Lockyer, Sam Thaiday.
Canterbury-Bankstown Bulldogs: Michael Ennis, Ben Hannant
Cronulla Sharks: Paul Gallen
Melbourne Storm: Cooper Cronk, Billy Slater, Cameron Smith
Newcastle Knights: Kurt Gidley
North Queensland Cowboys: Matt Scott, Johnathan Thurston, Willie Tonga
Parramatta Eels: Jarryd Hayne, Timana Tahu
South Sydney Rabbitohs: David Taylor
Manly Sea Eagles: Jason King, Brent Kite, Jamie Lyon, Anthony Watmough
Warriors: Brent Tate
Canberra Raiders: Jarrod Croker, Josh Dugan, Tom Learoyd-Lahrs, Joel Monaghan, David Shillington
Penrith Panthers: Petero Civoniceva, Michael Gordon, Michael Jennings, Luke Lewis.