I don't think any reasons were given for his release. I know we weren't happy with his punting, so I would guess it was simply performance based.
That would be my guess. Hammer went to the COVID list, we brought in Colquitt. Colquitt had a nice game, Hammer released. Colquitt not so much since then. The shank at the end of the Raider game shortened the field for them on the last drive.
Someone posted the Hammer signed with Buffalo.