This article is part of the series : REFEREE REVIEW 2012
Untold Arsenal has a team of qualified referees who have reviewed more than 40% of the EPL games from last season. The reviews themselves were based on full match video footage with the advantage of video technology features such as slow motion and pause.
By reviewing those 155 games we have made a database of more than 7000 decisions that have been judged by our panel of dedicated and qualified referees.
The numbers you will see are based on those decisions and those reviewed games.
After a little break in our ref review summary we now continue with the referees. The first ref we take a closer look at is Jonathan Moss. But allow me to that at this moment that this review may not seem relevant. But I would ask that you look at it as a way of introducing the way we reviewed the referees and their performances. I will try to explain the numbers as clearly as possible.
First of all we have 18 of such referee reviews. We start with the refs for whom we have done the fewest games. And when we enter the top 10 it will become a bit more interesting as we will try to award a prize at the end. Yes the last review we will announce the referee that our referee reviewers found the best of them all. This will be based mostly on the numbers of correct decisions and combined with the smallest bias index. In short, the UNTOLD REFEREE of 2011/12.
Let us start now at the beginning.
We only reviewed 1 game from Jonathon Moss in the last season, simply because Moss mostly got the lower placed teams in his games and rarely got a top team in his games. Now for referees who are rather new to the league this is a normal procedure. Given his age however, it is rather strange to bring in a ref in the top division when being over 40. But the PGMOL runs its own mysterious ways.
One game reviewed means we only did 9% of his games in the PL. So keep this in mind when we look at the numbers. It could have been a good day or a bad day. But we cannot draw real conclusions about him based on this game. We will do it for the sake of explaining things a bit, and for completeness – after all it would be strange to do a full review of the referees we saw, but then leave one or more of them out.
At the right hand side you can see all the games he did in the PL. Notice that each team involved is counted as 1. So you can see that Swansea has seen Moss the most with 4 times and Wolverhampton has seen him 3 times last season.
At the bottom of the right hand side you see the game(s) we have reviewed of this ref. In this case it is clear it was the game Aston Villa – Arsenal. Obviously some referees we saw over and over again – but as I say, not in this case.
Now let us see at his basic competence in this game.
And look at that score! A correct decision score of more than 86%! That really is a great score. It really is a terrible shame that we couldn’t review him more to see if this was a fluke or to confirm he is a good ref. Please enlighten me if you remember any bad games from him or big mistakes.
If we put weight on the decisions, the numbers drop a bit. But with a score of 83.72% correct decisions he has a very good score.
People who have followed us over the years know that in other countries a ref can only stay in the top when he has a weighted score of 70%. Based on these numbers Jonathan Moss can stay in the PL.
Let us see at the different type of decisions.
- And it will be no surprise to see that the numbers are good.
- 100% of the goal decisions were correct.
- 100% of the offside decisions were correct.
- With the other decisions he almost gets a score of 89% correct decisions. A really great result I would say.
- In his game he did miss one penalty. He made one correct penalty decision, but he missed a second decision.
- He had to give one red card and nobody could complain about that decision as it was a correct one.
- When it came to the yellow cards he made one mistake on the 4 decisions he had to make.
But all in all very good numbers apart from the penalty decisions.
Let us now enter the bias zone of this ref.
As this is a one game review we can see that this is based on 30 decisions and only 4 wrong decisions.
And then we see that all the wrong decisions went in favour of the home team in this case. If it would have been over more games we could ask ourselves if the ref is a typical home referee? But I really can’t stick out my neck and declare such a thing. I leave this to refs whom we have covered more. A bias of +4 to the home teams could indicate such a thing. Of course the bias against the away team is also -4.
If we put weight on the numbers we see that the numbers go op to a +7 bias for the home team and a -7 bias against the away team. In these numbers you can see that getting one important decision completely wrong has a bit influence in the numbers of a ref. In this case it was not giving a penalty for the away team (after he had given one correct in the first half) that caused him some bad points.
Let us now take a look at the different teams involved in the games we reviewed from Jonathon Moss.
In the un-weighted decisions we see that the 4 mistakes he made all were against Arsenal. Of course these numbers just based on one game is similar to the bias graphic. When we have more teams in this we can of course compare that with the “home and away bias” and see if there are any strange things to be seen.
I hope I will be able to explain this a bit more when we have more teams and more games in our reviews.
If we put weight on the decisions we see the same thing as in the weighted bias index numbers. In this case it mostly shows that our maths are correct.
All the wrong decisions went against the away team (in this case Arsenal) and the home team (Aston Villa) got the benefit of the decisions.
The only conclusion we can make is that we cannot make a conclusion on this ref. One game is not enough and would be unfair. If we were to do it I could say that Moss is a definite home ref who is biased against Arsenal. And that would be very harsh based on one game.
Or we could praise him in heaven for his high percentage score of correct decisions. But it could have been an easy game and he just maybe had a great day.
Based on his number of correct decisions we will give him the benefit of the doubt and we say that he can have his place in the PL for the season 2012-2013.
And hopefully when we can do more of his games we will know if he really is a good ref (or even a great ref) or if it just was a one off. And then hopefully we will be able to see if he is a home ref or that it just was a coincidence that his mistakes benefited the home team. In his advantage speaks that he gave a penalty for the visiting team and send a home player off the field. So it could have been a coincidence.
Taking all this in account I think Moss is not a bad referee at all. And I look forward to this coming season and hope he can confirm his overall correct decisions percentage and just work a bit on his wrong decisions and make sure they even out a bit.
The Great History of Arsenal Competition – hints will soon start to appear!