This was built using d3.js based upon code written by Adam Pearce. My code is available on my GitHub page
There are still things that I would like to do to this. I would like to make the circles change color simultaneously to the lines when the lines are hovered over. I would also like to have the clubs of each player show up in the tooltip but at a reduced font size - I'm not sure yet how to mix fontsizes in the same tooltip. It would actually be cool to be able to generate lots of small multiples of these types of charts for any country using these data.