|About the stats|
Over the course of his career, Ad Gumbert pitched 1,996 innings and made 1,053 plate appearances. Gumbert was worth 19.9 Wins Above Replacement (15.4 as a pitcher and 4.5 as a hitter) and 3.2 Wins Above Average (-1.0 as a pitcher and 4.1 as a hitter).
After adjusting for length of schedule, catchers, and relief pitchers, the 19.9 WAR becomes 18.0 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 3.2 WAA becomes 3.7 adjWAA.
Then, the adjWAR and adjWAA are combined, but with extra weighting given to adjWAA. This gives Gumbert 24.7 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).
Ad Gumbert has a Hall Rating of 23, leaving him nowhere close to induction to the Hall of Stats.
Want even more detail about the formula? See the About page.