|About the stats|
Over the course of his career, Ryan Mattheus pitched 198 innings and made 1 plate appearances. Mattheus was worth 1.0 Wins Above Replacement (1.0 as a pitcher and 0.0 as a hitter) and -0.6 Wins Above Average (-0.5 as a pitcher and 0.0 as a hitter).
After adjusting for length of schedule, catchers, and relief pitchers, the 1.0 WAR becomes 1.3 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 -0.6 WAA becomes 1.3 adjWAA.
Then, the adjWAR and adjWAA are combined, but with extra weighting given to adjWAA. This gives Mattheus 3.6 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).
Ryan Mattheus has a Hall Rating of 3, leaving him nowhere close to induction to the Hall of Stats.
Want even more detail about the formula? See the About page.