History
Worked out by reading the registry of every Minecraft build Mojang has published, in release order.
| Version | Date | What the files show |
|---|---|---|
| before 18w01a | — | Already in the game when Mojang’s data generator first shipped, in 18w01a (3 January 2018). The files do not say which earlier version added it. |
| 20w06a | 5 February 2020 | Display name changed from “Clay” to “Clay Ball”. |
| 1.16 | 23 June 2020 | Display name changed from “Clay” to “Clay Ball”. |