Roosters utility Connor Watson is in doubt for the grand final after failing a HIA during the first half of Friday night's win over the Dolphins.
Watson was scrapping for a loose ball on the ground in the 32nd minute and copped an accidental hip to the head from Kulikefu Finefeuiaki.
He was sent for a head injury assessment which he failed and was ruled out for the remainder of the match.
"That was a hard one because it came out as a Category 2 and then he went in to do it [the assessment] and they changed it to a Category 1 after a couple of minutes," coach Trent Robinson said post-match.
"He's in the middle of doing his tests now to see where he's at because he got ruled out of the game so I'd say that's still 'watch this space' on Connor.
"We'll see how the tests go."
The 30-year-old will now enter the concussion protocols and is in danger of missing next Sunday's grand final.
Roosters halfback Sam Walker made his return just three weeks after undergoing syndesmosis surgery and played 68 minutes before being given an early mark.
Walker suffered the injury in Round 26 and missed the Round 27 game against Souths and the two finals clashes against the Panthers and Sharks.
Another gun playmaker on track to line up in a preliminary final is Penrith's Nathan Cleary, who sustained a stress-related bone issue in his foot during the qualifying final win over the Roosters.
"Nathan had a pretty quiet week last week, but the week off was certainly nice for him and a few others," said co-captain Isaah Yeo said.
"I'm confident he'll be ready to go.
"If we had to play last week it would have been pretty sore, and he would have pushed through it, but it's settled down a little bit, so hopefully all systems go."
The Panthers welcome back Luke Garner after he was a late withdrawal from the Roosters game due to a minor groin strain.
Also back on deck is utility Jack Cogger after serving a three-game ban for a careless high tackle.
Casualty Ward By Club
Knights captain Kalyn Ponga left the field for an HIA in the closing minutes at Eden Park following a bone-crunching hit by Leka Halasima.
Ponga passed the assessment and was back on field post-game to celebrate with his teammates.
He has been named as part of an unchanged Knights side to take on the Panthers on Sunday.
Ponga's teammate Dylan Lucas completed a remarkable recovery from a broken and dislocated ankle when he was injected into the contest against the Wahs with 15 minutes remaining.
Dolphins prop Tom Flegler failed a HIA during the first half of his team's win over the Warriors in week one and will take his place against the Roosters having cleared the concussion protocols.
The Warriors were dealt a blow early in the second half when Charnze Nicoll-Klokstad left the field for an HIA and was later ruled out for the remainder of the contest. Teammate Taine Tuaupiki also left the field late in the contest after a head knock.
To view the complete NRL Casualty Ward, please visit the hub page.
Your club's NRL Casualty Ward
Broncos | Raiders | Bulldogs | Sharks | Dolphins
Titans | Sea Eagles | Storm | Knights
Eels | Cowboys | Panthers | Rabbitohs
Dragons | Roosters | Warriors | Wests Tigers
Casualty Ward
Brisbane Broncos
- Preston Riki (syndesmosis, World Cup)
- Reece Walsh (syndesmosis, World Cup)
- Brendan Piakura (concussion, 2027)
- Cory Paix (shoulder, 2027)
- Blake Mozer (concussion, 2027)
Canberra Raiders
- Morgan Smithies (concussion, World Cup)
- Hudson Young (Achilles, 2027)
- Zac Hosking (hamstring, 2027)
- Corey Horsburgh (shoulder, 2027)
- Savelio Tamale (knee, 2027)
Canterbury-Bankstown Bulldogs
- Jethro Rinakama (knee, 2027)
- Kurt Mann (groin, 2027)
- Sitili Tupouniua (hamstring, 2027)
- Sam Hughes (neck, 2027)
Cronulla Sharks
- Nicho Hynes (concussion, 2027)
- Mawene Hiroti (knee, 2027)
- Jesse Ramien (pectoral, 2027)
Dolphins
- No injuries
Gold Coast Titans
- Lachlan Ilias (back, 2027)
- Jaylan de Groot (knee, 2027)
- Zane Harrison (hamstring, 2027)
- Jojo Fifita (hip pointer, 2027)
- Oliver Pascoe (concussion, 2027)
- Jensen Taumoepeau (ankle, 2027)
- Jaimin Jolliffe (knee, 2027)
Manly-Warringah Sea Eagles
- Tolu Koula (ankle, World Cup)
- Ethan Bullemor (concussion, 2027)
- Taniela Paseka (knee, 2027)
- Joey Walsh (jaw, 2027)
- Luke Brooks (knee, 2027)
- Kobe Hetherington (bicep, 2027)
Melbourne Storm
- Jahrome Hughes (hamstring, World Cup)
- Jack Howarth (shoulder, 2027)
- Will Warbrick (Achilles, 2027)
- Xavier Coates (Achilles, 2027)
- Ativalu Lisati (syndesmosis, 2027)
Newcastle Knights
- Jacob Saifiti (suspended, 2027)
- Dylan Brown (ACL, 2027)
- Trey Mooney (shoulder, 2027)
North Queensland Cowboys
- Thomas Mikaele (hamstring, World Cup)
- Murray Taulagi (concussion, World Cup)
Parramatta Eels
- Isaiah Iongi (knee, World Cup)
- Charlie Guymer (knee, 2027)
- J'maine Hopgood (ACL, 2027)
- Matt Doorey (ACL, 2027)
- Richard Penisini (knee, 2027)
- Sam Tuivaiti (knee, 2027)
Penrith Panthers
- Nathan Cleary (foot, Finals Week 3)
- Luke Garner (groin, Finals Week 3)
- Jack Cogger (suspended, Finals Week 3)
- Paul Alamoti (hamstring, Finals Week 3)
- Izack Tago (knee, Finals Week 3)
South Sydney Rabbitohs
- Cody Walker (calf, 2027)
- Euan Aitken (shoulder, 2027)
- Ashton Ward (hamstring, 2027)
St George Illawarra Dragons
- Valentine Holmes (ankle, World Cup)
- Jacob Liddle (calf, 2027)
- Jaydn Su'A (pectoral, 2027)
- Hame Sele (Achilles, TBC)
- Clint Gutherson (knee, 2027)
- Hayden Buchanan (shoulder, 2027)
Sydney Roosters
- Connor Watson (head knock, TBC)
- Blake Steep (knee, 2027)
Warriors
- Charnze Nicoll-Klokstad (head knock, World Cup)
- Jackson Ford (ankle, 2027)
- Tanah Boyd (ACL, 2027)
Wests Tigers
- Alex Twal (concussion, World Cup)
- Kai Pearce-Paul (pectoral, World Cup)
- Adam Doueihi (shoulder, 2027)
- Taylan May (shoulder, 2027)
- Royce Hunt (pectoral, 2027)