French teenager Melissa Mayeux, 16, took a monumental step toward becoming the first female player in the 150 year history of Major League Baseball by having her name added to MLB's international registration list on Sunday. Mayeux is eligible to be signed by a team beginning July 2. Although there is no official rule excluding women from playing in the Majors, Mayeux is the first female ever to make the international registration list. MLB.com reported that while it's unlikely Mayeux will be signed right away, only serious candidates make the international registry.