|About the stats|
Over the course of his career, Mark Langston pitched 2,962 innings and made 100 plate appearances. Langston was worth 50.1 Wins Above Replacement (50.0 as a pitcher and 0.1 as a hitter) and 23.4 Wins Above Average (23.3 as a pitcher and 0.1 as a hitter).
After adjusting for length of schedule, catchers, and relief pitchers, the 50.1 WAR becomes 51.1 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 23.4 WAA becomes 27.2 adjWAA.
Then, the adjWAR and adjWAA are combined, but with extra weighting given to adjWAA. This gives Langston 100.1 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).
Mark Langston has a Hall Rating of 94, making him close to the Hall of Stats borderline—but still on the outside.
Want even more detail about the formula? See the About page.