Bearfax
Grizzly old fart
Let the figures demonstrate that T Wright and DCE were defending as part of a pack because of their assigned field positions and the other 5 were defending out wide, mostly on their own, hence their higher missed-tackle rate.
On the contrary being closer to the centre means they face some of the hardest defence, often against forwards. The backs out wide have an easier job of covering the smaller men and usually have more time to prepare for them coming. That's why the best defenders are in the forwards and at half and five eighth