|About the stats|
Over the course of his career, Hal Gregg pitched 826 innings and made 297 plate appearances. Gregg was worth -0.8 Wins Above Replacement (-1.1 as a pitcher and 0.3 as a hitter) and -8.2 Wins Above Average (-8.5 as a pitcher and 0.3 as a hitter).
After adjusting for length of schedule, catchers, and relief pitchers, the -0.8 WAR becomes -1.0 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 -8.2 WAA becomes 1.0 adjWAA.
Then, the adjWAR and adjWAA are combined, but with extra weighting given to adjWAA. This gives Gregg 0.8 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).
Hal Gregg has a Hall Rating of 1, leaving him nowhere close to induction to the Hall of Stats.
Want even more detail about the formula? See the About page.