|About the stats|
Over the course of his career, Tom Underwood pitched 1,586 innings and made 179 plate appearances. Underwood was worth 10.0 Wins Above Replacement (10.8 as a pitcher and -0.8 as a hitter) and -3.6 Wins Above Average (-2.6 as a pitcher and -0.8 as a hitter).
After adjusting for length of schedule, catchers, and relief pitchers, the 10.0 WAR becomes 10.4 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 -3.6 WAA becomes 3.0 adjWAA.
Then, the adjWAR and adjWAA are combined, but with extra weighting given to adjWAA. This gives Underwood 15.8 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).
Tom Underwood has a Hall Rating of 15, leaving him nowhere close to induction to the Hall of Stats.
Want even more detail about the formula? See the About page.