|About the stats|
Over the course of his career, John Roseboro made 5,529 plate appearances. Roseboro was worth 22.3 Wins Above Replacement and 1.6 Wins Above Average.
After adjusting for length of schedule, catchers, and relief pitchers, the 22.3 WAR becomes 26.9 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 1.6 WAA becomes 8.6 adjWAA.
Then, the adjWAR and adjWAA are combined, but with extra weighting given to adjWAA. This gives Roseboro 42.4 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).
John Roseboro has a Hall Rating of 40, leaving him nowhere close to induction to the Hall of Stats.
Want even more detail about the formula? See the About page.