Recently I read @DTMAboutHeart ‘s work on Expected vs. Observed Save % . The work revolves around determining what a goalie’s save % can be expected to be by accounting for player shooting talent during 5v5 play.
xSv% is the result of subtraction of Actual Sv% from Expected Sv%. This is how much the goalie deviated from the Expected Sv%, positively or negatively. Similarly, xGSAA is the number of goals the goalie prevented or allowed in relation to what was expected.
I wanted to find a way to visualize this, so I put together another viz workbook on .
The first tab displays every goalie for a particular season, sorted left to right by xGSAA. The black lines indicate the Expected Save %, and the colored bars indicate the goalie’s Actual Save %.
The second tab shows how goalies fared in xGSAA across their careers. The stacked bars are made up of each season of a particular goalie. Tall bars indicate that the goalie made a significant impact in that season. The bars are colored by xSv%.
The third tab shows each year of a goalie’s career. Again, the black line indicates the Expected Save %, and the bar indicates the Actual Sv%. The color of the bar is determined by the xGSAA for that year.