
In the leadup to Opening Day, Fangraphs published a series of “Positional Power Rankings”, which sought to measure how each team’s roster stacks up against others in the league, at each position.
The final rankings were computed two ways:
- Creating an ordinal list of teams, sorted by projected WAR at that position (ie. 1, 4, 12)
- Creating a z-score for projected WAR at each position (ie. +2.35, -0.76)
While method one is handy to quickly check relative position in the rankings, it doesn’t do a very good job of capturing how significant the differences are… For example, Juan Soto isn’t just the best right fielder, he is projected to be a lot better than the second best right fielder. As such, visualizing this data with z-scores of projected WAR gives us a more intuitive sense of the spread of the data, in addition to the ordinal rankings.









