|About the stats|
Over the course of his career, Bobby Mathews pitched 4,956 innings and made 2,559 plate appearances. Mathews was worth 55.2 Wins Above Replacement (62.3 as a pitcher and -7.2 as a hitter) and 20.5 Wins Above Average (28.4 as a pitcher and -7.8 as a hitter).
After adjusting for length of schedule, catchers, and relief pitchers, the 55.2 WAR becomes 38.3 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 20.5 WAA becomes 29.1 adjWAA.
Then, the adjWAR and adjWAA are combined, but with extra weighting given to adjWAA. This gives Mathews 90.7 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).
Bobby Mathews has a Hall Rating of 85, leaving him short of induction to the Hall of Stats.
Want even more detail about the formula? See the About page.