Xtreme Math Football (XMF) ©2001, Xtreme Math Soccer (XMS) ©2003, Xtreme Math Baseball (XMB) ©2004 and Xtreme Math BasketBall (XMB2) ©2005 are  protected by U.S. Copyright Laws. They were written and developed by Xtreme Math Games, XMF®, XMS®, XMB® and XMB2® are filed with the United  States Registered Trade Mark and Patents office.