Tracking how well NRL teams win – and lose

Looking at the Round 16 NRL draw, I couldn’t help but think the Tigers were the weekly special, certain to rack up a 13+ victory over the Raiders on Saturday night.

They need to, right? They are well behind where they need to be in their Points Differential (-33). So, even though they have equal competition points to the Eels and Storm, they are still behind them by virtue of that inferior differential. Not that those two teams are doing well in this respect either, I should add. It could literally mean the difference between making, or missing, the Top 8 for the Tigers, and needs urgent attention.

The scene is set for them to post a big win against a club in turmoil, and who are playing the sort of uninspired football that validates their 3rd-last position. And if they can’t do it against the Raiders, one wonders who they can do it to.

But how likely is it? Of their seven wins this year, only two have been 13+ (a 30-point margin over the Titans in Round 2 and a 16-point win against Manly in Round 5 – both quite some time ago). The rest have averaged 5.8 points, or a median of just 3pts.

(I like the median with smaller data sets because it clips off the outliers and gives us a central tendency).

Below is the median win margin of all teams over the 2014 so far:Median Win

Hmm, maybe I’d better look deeper into this before splashing out on a 13+ ticket for this match – if I even end up going there at all, as now seems unlikely! With a median of 9pts, the Tigers and 13+ results don’t seem to fall into the expected category.

As for the Raiders, their average losing margin this year is 16.8pts, with a median of 13pts, but the last five matches are somewhat better (loss average 13pts and median 11pts – with a win thrown in). So far, the Tigers 13+ isn’t quite stacking up as I’d hoped, but all is not lost yet.

Over this period, the Tigers have had three clear losses to superior teams, but only beat the Sharks by 2pts and the Knights by 3pts. Yes, the bottom two teams.

Let’s add in for good measure the record at the poorly supported Campbelltown Stadium – a 12pt win against the Cowboys, who can’t even get interested south of the border, and a narrow loss to the Broncos.

Uggh … Tigers 13+ just doesn’t stack up for risk/reward. Even if the Tigers win by 30pts tonight, I won’t be upset about not having put on the 13+ bet. It leaves a little more to chance than I would like, and I’m not that lucky! And you’re not getting paid to take the risk (13+ at 2’s? Nah ah).

Maybe we can salvage something though. The two matches played at Campbelltown were relatively low-scoring – 20pts and 30pts respectively. With the Over/Under line at around 42-44 (depending on agency), perhaps there’s an angle. The median total points of all Tigers matches this year is 42pts, and 46pts for the Raiders. So, the Over/Under looks right from an historical numbers sense, but still a little high given form and venue.

Ranking the Win & Loss Margins

Parramatta’s collection of losses (the worst in the NRL) initially motivated me to look at the margins by which teams typically win and lose, but hadn’t done anything until prompted by this Tigers match and a desire to see if having a lash was worth it.

The Eels’ loss against the Tigers in Round 7 was bad enough considering their dominance that day, but following it up with a thumping at the hands of the Cowboys was a fortnight that (I thought at the time) set their Finals hopes back and may come back to haunt them. Then again, subsequent losses have been equally as bad! How bad?

Check out the following chart, highlighting just how poorly the Eels have performed when losing matches. It’s very unlike what you’d expect from a team clinging to 8th spot.Median Loss

Even if the Eels have the attack worthy of finalists, they don’t have the defence at this point. So, while I’d personally like to see some of their champ(Hayne) best in September, I’m not betting on it.

You can lump the Tigers into that category as well. In both cases, it doesn’t auger well for Finals football against the current Top 6, who demonstrate far greater resolve when behind on the scoreboard. Cultivating that sort of attitude becomes a habit, and teams can’t draw upon it when needed if they don’t have it.

The surprise packet in the chart above is clearly the enigmatic Cowboys. A median loss of just 4.5pts (and an average of just over 8pts)? Really? Well, onsider that five of their losses have been within a 1-5pt range. Throw in losses of 8pts and 12pts, and the only big (Origin-affected) loss was the 30pt drubbing by the Raiders. As far as loss records go, that’s pretty impressive. And it’s made me rethink their match against the Rabbitohs too!

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