Kickballer can be farmed by defeating a specific boss, just like most other legendaries in Borderlands 4, so it's pretty easy to get. You can start farming for Kickballer quite early in the game, too.

As pointed out by u/CosmeticInk5, that's because of the All-Arounder perk, which means that the Bod counts not only as a shotgun, but as an assault rifle, sniper, pistol, and SMG. They rightfully ...