Kevin "Karen" Cash has a career OPS+ of 37.
That seems to make him the worse baseball player of the live-ball era.
The only player I can find with a lower OPS+ is a catcher by the name of Bill Bergen, who played during the dead-ball era.
Can anyone find a worse player than "Karen" Cash?
I wouldn't be surprised if there is no player in the live-ball era worse than Karen. I saw her play with the Yankees for a bit, and she aspired to be called "sucky."