Some points to make on the statistics being quoted.
The stats at
http://www.ruggastats.com are a summary of the data prepared by Verusco. They supply data for the Wallabies, All Blacks, Springboks and all Super Rugby franchises.
The stats at
http://www.rugbystats.com.au are a summary of the data prepared by Sportsdata. They supply data for Fox and other media organisations.
They are professional providers of data and employ teams of people to code games. I've seen the detailed data Verusco provide which is absolutely amazing in the detail. To code these games they give a bunch of people a few minutes each to code and RuckingGoodStats says they take 40 hours to code each game.
Even with this much time spent on a game you are going to get differences in what is recorded.
For example the stats showing Kepu hit only 4 rucks/mauls are those provided by RugbyStats as noted by Athilnaur. Those same stats show Elsom only hitting 10 rucks/mauls. The stats provided by RuggaStats show Kepu hit 7 breakdowns in defence and 22 in attack for a total of 29 whilst Elsom hit 9 breakdowns in defence and 19 in attack for a total of 28.
I also code the games and I recorded Kepu hitting 4 breakdowns in defence and 23 in attack for a total of 27 whilst I recorded Elsom hitting 12 breakdowns in defence and 18 in attack for a total of 30.
It seems therefore that the ruck/maul stats published by Sportsdata are probably only for defensive rucks and mauls. I don’t know why you’d ignore attacking rucks and mauls but that seems to be the only way to explain such a large discrepancy.
The difference continues with tackles. Again I’ll use Kepu and Elsom as the examples. Verusco have Kepu making 5 tackles and missing 0, Sportsdata have Kepu making 6 tackles and missing 0. I have Kepu making 6 tackles and missing 0. For Elsom Verusco have him making 11 and missing 4, Sportsdata have him making 9 and missing 6 and I have him making 10 and missing 4.
Why the differences? Could be some mistakes but is more than likely to be differences in interpretation. For example, do you record a missed tackle if the player comes across in cover, tackles the ball carrier and the ball carrier stumbles on for a couple of metres before falling to the ground and another player jumps on him to complete the tackle but the tackler fell off him once he’d made contact? On one hand he was the player that got him to ground but on the other hand he let go and the player made a couple of extra metres and could have got up and gone again but for the other player. I couldn’t tell you what I would code that as without seeing the tackle but two different people could code that differently. When you take into account that the professional suppliers use multiple people to code part of the same game, there could also be different interpretations within their own staff.
I know RuckingGoodStats also codes the game but measures different things.
Anyone know of any other published statistics that are not drawing data from the sources listed here?
You can see my statistics from last weekends game at
http://www.greenandgoldrugby.com/austins-tn3-match-review-and-statistics/