|About the stats|
Over the course of his career, Sumner Bowman pitched 146 innings and made 100 plate appearances. Bowman was worth -2.1 Wins Above Replacement (-2.3 as a pitcher and 0.2 as a hitter) and -3.2 Wins Above Average (-3.3 as a pitcher and 0.1 as a hitter).
After adjusting for length of schedule, catchers, and relief pitchers, the -2.1 WAR becomes -1.7 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 0.0 adjWAA.
Then, the adjWAR and adjWAA are combined, but with extra weighting given to adjWAA. This gives Bowman -1.7 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).
Sumner Bowman has a Hall Rating of -2, leaving him nowhere close to induction to the Hall of Stats.
Want even more detail about the formula? See the About page.