Did your team improve or regress in ’11-12?

By now the ’11-12 season Premiership has been looked at in pretty much every way possible. I’m going to add one more to the mix. Seventeen teams survived in the Premiership last season; the two plots below compare their performance in ’10-11 and ’11-12. Norwich, QPR, and Swansea are missing from the plot as they don’t have any data for ’10-11. They’ll be here next year though.

First up the traditional counting stats; points and goal difference. For both of these plots the tail of each arrow represents ’10-11 and the head of each arrow represents ’11-12.

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There’s nothing surprising here, these are the numbers we’ve seen throughout the season (and we already knew that points and goal difference were strongly correlated). Below is the same plot but with TSR and PDO.

An explanation of total shots ratio can be found here and here, for PDO see here and here.

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No matter what measure I use, Manchester City’s season was simply remarkable.

Kenny Dalglish was a victim of fate. Liverpool were a good team this year.

There’s a whole group of clubs in the middle there that are essentially equal in terms of ability. I strongly believe that any one of those teams could get into the top six via good luck and be relegated due to bad luck.

The cause of Blackburn’s relegation is pretty evident. They went from a terrible team with great luck to a terrible team with poor luck and that was enough to send them down.

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