|About the stats|
Over the course of his career, Willie Mays made 12,545 plate appearances. Mays was worth 156.3 Wins Above Replacement and 110.2 Wins Above Average.
After adjusting for length of schedule, catchers, and relief pitchers, the 156.3 WAR becomes 157.8 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 110.2 WAA becomes 111.2 adjWAA.
Then, the adjWAR and adjWAA are combined, but with extra weighting given to adjWAA. This gives Mays 358.0 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).
Willie Mays has a Hall Rating of 336, making him not only a member of the Hall of Stats—but one of the very best players of all time.
Want even more detail about the formula? See the About page.