|About the stats|
Over the course of his career, Frank Viola pitched 2,836 innings and made 210 plate appearances. Viola was worth 47.0 Wins Above Replacement (47.1 as a pitcher and -0.2 as a hitter) and 22.0 Wins Above Average (22.1 as a pitcher and -0.2 as a hitter).
After adjusting for length of schedule, catchers, and relief pitchers, the 47.0 WAR becomes 47.2 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 22.0 WAA becomes 27.4 adjWAA.
Then, the adjWAR and adjWAA are combined, but with extra weighting given to adjWAA. This gives Viola 96.5 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).
Frank Viola has a Hall Rating of 91, making him close to the Hall of Stats borderline—but still on the outside.
Want even more detail about the formula? See the About page.