|About the stats|
Over the course of his career, Roman Mejias made 1,905 plate appearances. Mejias was worth 1.0 Wins Above Replacement and -5.7 Wins Above Average.
After adjusting for length of schedule, catchers, and relief pitchers, the 1.0 WAR becomes 0.9 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 -5.7 WAA becomes 0.2 adjWAA.
Then, the adjWAR and adjWAA are combined, but with extra weighting given to adjWAA. This gives Mejias 1.3 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).
Roman Mejias 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.