|About the stats|
Over the course of his career, Tom O'Brien made 1,165 plate appearances and pitched 3 innings. O'Brien was worth -1.6 Wins Above Replacement (-1.4 as a hitter and -0.1 as a pitcher) and -3.5 Wins Above Average (-3.4 as a hitter and -0.1 as a pitcher).
After adjusting for length of schedule, catchers, and relief pitchers, the -1.6 WAR becomes -1.8 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 -3.5 WAA becomes 0.6 adjWAA.
Then, the adjWAR and adjWAA are combined, but with extra weighting given to adjWAA. This gives O'Brien -0.7 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 O'Brien has a Hall Rating of -1, leaving him nowhere close to induction to the Hall of Stats.
Want even more detail about the formula? See the About page.