|About the stats|
Over the course of his career, Mike Mason pitched 605 innings and made 13 plate appearances. Mason was worth 5.1 Wins Above Replacement (5.0 as a pitcher and 0.2 as a hitter) and -0.2 Wins Above Average (-0.3 as a pitcher and 0.2 as a hitter).
After adjusting for length of schedule, catchers, and relief pitchers, the 5.1 WAR becomes 5.3 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 -0.2 WAA becomes 2.7 adjWAA.
Then, the adjWAR and adjWAA are combined, but with extra weighting given to adjWAA. This gives Mason 10.2 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).
Mike Mason has a Hall Rating of 10, leaving him nowhere close to induction to the Hall of Stats.
Want even more detail about the formula? See the About page.