|About the stats|
Over the course of his career, Billy O'Brien made 1,491 plate appearances and pitched 10 innings. O'Brien was worth 4.0 Wins Above Replacement (4.1 as a hitter and -0.1 as a pitcher) and -0.9 Wins Above Average (-0.7 as a hitter and -0.1 as a pitcher).
After adjusting for length of schedule, catchers, and relief pitchers, the 4.0 WAR becomes 7.8 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 -0.9 WAA becomes 1.3 adjWAA.
Then, the adjWAR and adjWAA are combined, but with extra weighting given to adjWAA. This gives O'Brien 10.1 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).
Billy O'Brien has a Hall Rating of 10, leaving him nowhere close to induction to the Hall of Stats.
Want even more detail about the formula? See the About page.