| BAT KEY: |
| Names in parentheses indicate that the first name of the player is deduced from various factors | Sig: The facsimile signature of the player's name is stamped into the barrel of the bat |
| Block: The player's name is stamped into the barrel in block letters | Master: bat used as a template to make a particular player's bat |
| Side-written only: Information denoting the player is written by the factory on the side of the barrel when a player sent his bat in to be used as a prototype for future bats* | Lathe: Bats used as a guide to place on the lathe to produce a particular player's bats |
| Hillerich & Son: 1890's - circa 1912: J. F. Hillerich & Son | Blank: no brand name whatsoever |
| Hillerich & Son Co.: circa 1911-1916: J.F. Hillerich & Son Co. | Handmade: no brand name whatsoever |
| H&B: Hillerich & Bradsby circa 1916-1980 | Adirondack: Adirondack Bat Co. post 1945 |
| Powerized: post 1930 H&B | Spalding: Spalding Sporting Goods Co. |
| ddd: dash, dot, dash in H&B center brand circa 1917 - 1922 | A.J. Reach: A.J. Reach Sporting Goods |
| dddd: double dash dot dash in H&B center brand circa 1916-1918 | Kren: Joseph P. Kren Bat Co. |
| | Wright & Ditson: Wright & Ditson Sporting Goods |