Radley set for technical change to avoid concussions

Victor Radley will consider changes to his tackling technique to protect his head after being ruled out of the Sydney Roosters' clash with the Warriors through concussion.

Radley was left dazed when he went head-first into Kenny Bromwich's hip in last Sunday's loss to the Dolphins, before he was ruled out on Friday.

Radley suffered multiple head knocks last year, including a sickening blow that left him convulsing on the ground after attempting a hit on Jesse Bromwich.

The Roosters lock is known as one of the game's toughest defenders and hardest competitors.

But coach Trent Robinson said the 24-year-old's technique had to be closely looked at, with the matter raised with Radley this week.

"We've discussed it again today," Robinson said on Friday.

"It comes from the right spot, the way he wants to play and attack oppositions at certain times to try and make the Roosters better.

"But him staying on the field is what is best for us. There have been discussions around that."

Radley was named by the Roosters on Tuesday and while he had been symptom-free for the majority of the week the call was made on Friday to rule him out.

His absence adds to a long injury toll for the Roosters, with Matt Lodge out for up to six weeks after copping a facial fracture in the loss to the Dolphins.

The Roosters are hopeful Jared Waerea-Hargraves will be named next week after a back injury, while Dylan Napa's return to the NRL at the club is still some weeks off.

Joey Manu will at least return against the Warriors at Allianz Stadium, with Robinson confident he won't have mental hurdles to clear making tackles after another facial fracture.

The centre will likely wear a headgear on his return after Luke Keary did likewise last week, while Brandon Smith could also wear headgear to protect stitches in his face.

"He has trained with some protection on that area which we will have tomorrow," Robinson said of Manu.

"The degrees of where he is at (mentally) with it is hard to work out.

"But I know what I have seen at training and the confidence he has got from attacking the physical parts of training.

"I have seen him in the wrestle room, I have seen him on the field going into contact. So I feel like he is ready to go."

Robinson also insisted there was no need for the team to enter panic mode after the shock loss to the Dolphins, with the club traditionally slow starters.

"You have to fix some things, but you don't need to jump at shadows," he said.