I have spent a long dang time today trying to figure this out and have came up with the same conclusion as BigWaveDave. Also what might be a possibility is someome signing their name to a ball just for kicks. I know I did it as a kid just to be cool.
And another possibility is it wasn't a cleveland player at all could have been a minor or major league player who was out doing a signing or speech on drugs and did signed baseballs. I have a signed baseball from a major league baseball player who was visiting our school to do a speech about his life growing up on the streets and the influence of drugs on young adults.