Gerringong forward Hamish Stewart was one of several Dragons who were bruised and battered in their courageous 34-20 win over Parramatta in Wollongong on Saturday night.

Stewart was concussed when he tried to make a big tackle from a kick restart but he reeled away, heavily dazed by the impact.

He was taken from the field straight away and ruled to have suffered a category-one concussion which means he will have to sit out next week's trip to Canberra.

The Dragons were the walking wounded at WIN Stadium with Christian Tuipulotu pulling out in the warm-up, second-rower Luciano Leilua straining a thigh muscle, Toby Couchman dislocating his shoulder and bench forward Viliame Fifita picking up a knee injury on top of Stewart's head knock.

Co-captain Damien Cook played on through an ankle injury, Maroons centre Valentine Holmes had a corked thigh and winger Nathan Lawson could barely move his arm in the final 15 minutes but remained on the field.

They started the match like a house on fire to lead 26-4 at half-time.

But as their injuries mounted, Parra stormed back into the game and nearly stole the two competition points but had a crucial try disallowed when winger Josh Addo-Carr was ruled to have stepped on the sideline.

The Dragons celebrate a try to Valentine Holmes. Photo: The Bugle

"It could have gone either way but the spirit and courage got us home," Dragons coach Shane Flanagan said.

Stewart had made a solid impact after coming on off the bench. He pulled off 17 tackles and made five hit-ups in his 27-minute stint to continue his impressive rookie season in the NRL.