|About the stats|
Over the course of his career, Henry Gruber pitched 1,239 innings and made 565 plate appearances. Gruber was worth 4.9 Wins Above Replacement (4.9 as a pitcher and -0.1 as a hitter) and -4.5 Wins Above Average (-4.5 as a pitcher and -0.2 as a hitter).
After adjusting for length of schedule, catchers, and relief pitchers, the 4.9 WAR becomes 3.9 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 -4.5 WAA becomes 1.7 adjWAA.
Then, the adjWAR and adjWAA are combined, but with extra weighting given to adjWAA. This gives Gruber 7.0 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).
Henry Gruber has a Hall Rating of 7, leaving him nowhere close to induction to the Hall of Stats.
Want even more detail about the formula? See the About page.