Margin
Margin combines scoring and defence into one number and anchors the recent form story.
This derby lands with the Roosters marked as $1.68 favourites and the Rabbitohs out to $2.19, so the first question is whether the market has priced reputation more heavily than current numbers. There is enough in the recent data to make that a live discussion. The Roosters still own the shorter quote and they did smash South Sydney 36 to 6 in their most recent meeting in Round 27 2025, but the Rabbitohs arrive off a 40 to 30 win over the Dolphins in Round 1 while the Roosters were beaten 42 to 18 by the Warriors. For a game with this much feeling around it, the data says it is tighter than the headline odds suggest.
The best price for Roosters is $1.76 with UniBet, offering 4.7% better return than the average market price. The best price for Rabbitohs is $2.30 with TAB Sportsbet, offering 5.2% better return than the average market price.
| Betting Agency | Roosters | Rabbitohs | Total | Line |
|---|---|---|---|---|
| Neds | $1.68 | $2.20 | 49.5 | 2.5 |
| BetEstate | $1.71 | $2.15 | 49.5 | 1.5 |
| Dabble | $1.65 | $2.25 | 49.5 | 3.5 |
| Sportsbet | $1.66 | $2.23 | 49.5 | 2.5 |
| TAB Sportsbet | $1.62 | $2.30 | 49.5 | 2.5 |
| PlayUp | $1.67 | $2.20 | 49.5 | 2.5 |
| BetR | $1.70 | $2.15 | 49.5 | 2.5 |
| BetRight | $1.68 | $2.18 | 49.5 | 3.5 |
| UniBet | $1.76 | $2.05 | 49.5 | 1.5 |
| PointsBet | $1.68 | $2.15 | 49.5 | 3.5 |
| Bet365 | 26.5 |
South Sydney come in with a 0-0 season record, but their last five games paint a fairly lively picture. They have scored 25.2 points a game and conceded 20 in that stretch, with wins over the Dolphins, Dragons, Eels and Titans either side of that 6 point stumble against the Roosters in Round 27 2025. Their attack has not been built on wild low percentage footy either. They have completed at 80% across the last five games, which is just above the league average of 80%, and they have kept errors down to 8.4 a game, which is 2.7 below the league average of 11.1. The outlier in that run is the Roosters game where they managed only 6 points, but on either side of it they posted 40, 20 and 20 before opening 2026 with another 40.
The Roosters also sit at 0-0 for the new season and their recent five game stretch has been much choppier than the market price suggests. They have scored 22.8 points a game and conceded 21.6. That looks respectable on the surface, but the game log swings hard from a 40 point haul against the Storm in Round 26 2025 to 10 against the Sharks in Round 25 2025 and then only 18 against the Warriors in Round 1 2026. Their biggest recent strength is that they have held opponents to 3 line breaks a game over the last five, which is well below the league average of 5.1, but the Roosters have also completed at only 70%, which is below the league average of 80%, and they are coughing up 14.6 errors a game. That is 3.5 above the league average and 6.2 more than the Rabbitohs have made over the same stretch.
Margin combines scoring and defence into one number and anchors the recent form story.
The Rabbitohs case starts with control. Their 80% completion rate is not only better than the Roosters' 70%, it also lines up well against a Roosters defence that has allowed opponents to complete at 80% over the last five games. South Sydney are also forcing 2 drop outs a game, which is 0.9 above the league average of 1.1, so there is evidence they can turn that tidy possession into repeat pressure. They have had a slight possession edge too at 50% over the last five compared with the Roosters' 50%, and while that number looks even on paper, the Rabbitohs have done more with it because they are not wasting sets at the same rate. The concern is that their defensive shape can get loose. They have given up 13.2 offloads a game to opponents over the last five, which is well above the league average of 9.9, and their 21.4 ineffective tackles is 5.7 above the league average of 15.7. That is the soft underbelly the Roosters will want to hammer.
South Sydney have been far cleaner with the ball over their last five games and that gives them a real platform against a Roosters side that has leaked field position through poor completions.
The Roosters have a much cleaner defensive read than their price critics might admit. They are allowing only 23.6 opponent tackle busts a game over the last five, which is 11.3 below the league average of 34.9, and only 3 opponent line breaks a game. That matches up nicely against a Rabbitohs attack that has produced just 27.6 tackle busts a game over the same period, which sits 7.1 below the league average. That part almost cancels out. The problem for the Roosters is the mess they are making themselves. Their 14.6 errors a game is ugly next to the Rabbitohs' 8.4, and it also plays straight into a South Sydney trend where opponents have made 14 errors a game against them in the last five. The Roosters are also finishing sets less cleanly than South Sydney. Their 70% completion rate sits 10 percentage points below the Rabbitohs and well below where a favourite usually wants to be in a derby that could turn into an arm wrestle.
The Roosters have been far sloppier than South Sydney and that matters in a match where extra possessions could decide it.
South Sydney have more than one way to open this game up. Cody Walker has been the sharpest organiser in the side, posting 1.8 line break assists and 1.4 try assists a game across his last five, and he also forced 4 drop outs in the most recent match against the Dolphins. That is a huge hand in the kicking and passing game. Latrell Mitchell is carrying plenty of punch as well with 3.2 tackle busts, 1.2 line break assists and 1.4 try assists a game over his last five, and he broke the Roosters open for 2 line breaks in the most recent outing. Jye Gray has added another live wire element with 3.8 tackle busts a game across his last five, while Alex Johnston has been dangerous without needing a mountain of touches, producing 1 line breaks and 3 tackle busts a game over his last five. That gives South Sydney genuine strike on the edges and through the middle third of the field.
Walker has been South Sydney's sharpest creator over the last five games and his passing game is central to their upset hopes.
The Roosters still have the headline match winners and their best players are in strong touch. Mark Nawaqanitawase has been tearing through sides with 1.6 tries, 2 line breaks and 8.4 tackle busts a game across his last five, which is thunderous production from a winger. James Tedesco remains the main connector with 1.4 line break assists, 1.4 try assists and 6 tackle busts a game over his last five, and he piled on 11 tackle busts in the most recent match. Billy Smith has chipped in with 2.8 tackle busts a game across his last five and delivered 2 line breaks against the Warriors, while Sam Walker has quietly kept the attack moving with 0.8 try assists a game over his last five. The issue is that several of those same Roosters are carrying some sloppiness too. Tedesco has 1.8 errors a game in his last five, Nawaqanitawase 1.2 and Walker 1.2, so the upside is obvious but so is the risk.
Nawaqanitawase has been the Roosters' most damaging ball runner and his yardage and tackle busts can flip momentum quickly.
This looks like a game where South Sydney will want to win the set battle first and let their creators go to work once the Roosters are turning around. The Rabbitohs are more likely to complete, they are making far fewer errors, and Walker has been feeding line break chances at a very healthy rate. If they can pin the Roosters in their own end and keep asking questions of a side that has already been below par with the ball, the home favourite could end up playing this at South Sydney's tempo instead of its own. The Roosters route is more explosive. Their defensive numbers against opponent line breaks and tackle busts are much stronger, so if they can drag this into a more fractured game they have the outside backs and Tedesco support play to cash in. The trouble is that South Sydney's strengths line up directly with the Roosters' biggest weakness. One side is cleaner. The other is more volatile. In a derby, that usually matters.
The Roosters have defended more cleanly than South Sydney over the same window and that is their clearest counter to the Rabbitohs ball control.
The Roosters are the market favourite at $1.68, which implies 59.5%. The Rabbitohs at $2.19 imply 45.7%. On the numbers here, that favourite quote looks too short. South Sydney have been the tidier side over the last five games with an 80% completion rate against the Roosters' 70%, and they have made only 8.4 errors a game compared with 14.6 from the Roosters. The Roosters do defend better in some key areas, especially with only 3 opponent line breaks and 23.6 opponent tackle busts allowed per game, so this is not a runaway Rabbitohs case. But the Rabbitohs have enough control and enough creation through Walker and Mitchell to make this much closer than the market says. We think the market has got this one wrong and we predict an upset. Our fair probability is Rabbitohs 52% and Roosters 48%. That gives South Sydney a greater chance at an upset than the market is implying, so the value bet is Rabbitohs head to head at $2.19.
South Sydney have held a slightly better share of the ball lately and that supports the case that they can stay in the grind long enough to threaten the upset.