Former Major League baseball star Manny Ramirez has pleaded not guilty to a domestic battery charge involving his wife. Ramirez's attorney filed the written plea ahead of Friday's scheduled arraignment. Ramirez did not appear at the hearing. He is free on $2,500 bail. He was arrested Sept. 12. His wife told investigators Ramirez slapped her, causing her head to strike a bed headboard. Ramirez has denied slapping her.