He was cut at the crime scene so it doesn't matter how he did it. His blood was at the crime scene near the bloody footprint.
There is no record that Furhman ever planted evidence at a crime scene. He claimed he did so in the N-word tapes and that he and others violently assaulted potential suspects. Because of the tapes his police record was scrutinized and no collaboration was found for either claim. His partners said that he always acted in a professional manner.
I made up how it was impossible for Furhman to have possession of the glove? He would have to be the first to arrive at the scene, the first people to arrive lied about there being only one glove and met him somewhere or he was the murderer. How do you think he had the glove? And as I said before, he would had to know OJ had no alibi before he could plant it.
You might not have around then or when OJ was playing, but he was extremely popular. There was no motivation to frame him. Even the prosecutor, Marcia Clark, said in court that she wished it had been someone else.