Raiders under-20s player Matt Frawley.

Raiders under-20s player Matt Frawley.

Canberra Raiders under-20 coach Mick Mantelli has branded a vicious shoulder charge that left utility Matt Frawley with brain bruising as a ''pretty blatant and intentional'' act.

Mantelli is adamant Warriors player Viliami Kaveinga has been let off lightly, despite facing an eight-week suspension for a grade five shoulder charge after he was sent off during Saturday's match at Canberra Stadium.

The match was delayed for some time after Frawley was taken off on a medicab after he started convulsing following Kaveinga's late hit.

Frawley was taken to hospital for tests on Saturday night and was released on Sunday morning, but returned to hospital for further observation later that afternoon before being released again on Monday.

It is believed he will make a full recovery and won't suffer any lingering mental effects. The Raiders will take no chances with his health, ruling him out of football for at least four to six weeks.

Frawley also requires plastic surgery to a deep laceration inside and outside his lip which needed several dozen stitches.

''I think he [Kaveinga] has got off reasonably lightly, it looked very intentional on tape,'' Mantelli said. ''We sent a copy of it to the NRL, it shows Matt starting to fit not long after he hits the ground, which is pretty disturbing.

''He leant off the pass and his body had no protection, the kid hit him with his shoulder and elbow.

''He's lucky he didn't break his jaw or lose his teeth. It was pretty blatant, it wasn't like it was an accident.''

Kaveinga is the first player to face a long suspension under the game's tough crackdown on shoulder charges.

Frawley will be monitored by Raiders head doctor Wilson Lo over the next few weeks.

''When I asked Matt's mum on Sunday why they wanted him to go back in [to hospital], she said it was just precautionary.

''Bruising of the brain, you can't be stuffing around with that, we won't be taking any chances with him.''

In better news, four Raiders have been chosen for Saturday's under-20 State of Origin clash at Centrebet Stadium.

Mitch Cornish will play halfback for NSW, while Anthony Milford, Brenko Lee and Luke Bateman won selection for Queensland.

Raiders first grade assistant Andrew Dunemann will coach the Maroons.