PLFantasy

We had an interesting comment from a reader this week regarding the visualization posted plotting actual points with expected points. My proposition was that the players whose xP trailed their actual points by a distance were likely undervalued by the market, and while we wouldn't suggest they will somehow "make up" those points left on the table to date, we would  expect their production to take an uptick assuming they continue to get chances and playing time at a relatively consistent rate. The reader had a different view: "When I look at this chart I don't see underperformers or overperformers all I see is players on form who are capitalising on their chances (Ramsey and Rooney) and players who are of such quality that they will always out perform the normal (Aguero and Yaya) . . . I believe that if you reconstructed this table after xmas with a start date of tomorrow then the same players would occupy the two sides." It's a fair proposition and...

A couple of weeks back, we looked at the correlation between shots on goal and goals scored and (unsurprisingly) found a pretty strong link between the two. This ground breaking research probably won't make it into the next Freakonomics book but it might help illustrate players who are getting good looks at goal but not converting their chances. I went on to mess up my explanation of regression to the mean (h/t to mustardking for correcting me) but in essence, while players who have yet to capitalise on a number of shots on target, don't suddenly find themselves 'due' a goal, if a player continues to get in good positions and take good shots, over a period of time we would expect them to score at their historical rate going forward (normally around a goal every three shots on target for elite players). Building on the shots analysis, we can now move onto to trying to predict assists. This is inherently trickier as the inputs we need to use will almost certainly invo...