|About the stats|
Over the course of his career, Orel Hershiser pitched 3,130 innings and made 949 plate appearances. Hershiser was worth 56.0 Wins Above Replacement (51.4 as a pitcher and 4.7 as a hitter) and 29.2 Wins Above Average (24.8 as a pitcher and 4.6 as a hitter).
After adjusting for length of schedule, catchers, and relief pitchers, the 56.0 WAR becomes 57.9 adjWAR. Then, WAA is adjusted by ignoring negative seasons (thus, truly capturing a player’s peak seasons) and making similar adjustments for catchers and relief pitchers. After these adjustments, the 29.2 WAA becomes 27.7 adjWAA.
Then, the adjWAR and adjWAA are combined, but with extra weighting given to adjWAA. This gives Hershiser 107.8 wWAR. wWAR is then converted to Hall Rating. A Hall Rating of 100 represents the Hall of Stats borderline (similar to OPS+ or wRC+, where 100 represents league average).
Orel Hershiser has a Hall Rating of 101, making him a member of the Hall of Stats—but one who sits very close to the borderline.
Want even more detail about the formula? See the About page.