|About the stats|
Over the course of his career, Jelly Jackson made 1,224 plate appearances. Jackson was worth -3.8 Wins Above Replacement and -7.5 Wins Above Average.
After adjusting for length of schedule, catchers, and relief pitchers, the -3.8 WAR becomes -8.9 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 -7.5 WAA becomes 0.0 adjWAA.
Then, the adjWAR and adjWAA are combined, but with extra weighting given to adjWAA. This gives Jackson -8.9 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).
Jelly Jackson has a Hall Rating of -8, leaving him nowhere close to induction to the Hall of Stats.
Want even more detail about the formula? See the About page.