I had a runner cross the plate with a throw coming to the plate. The throw was off line and there was no play at the plate. Two runners scored on the play, and after they both went into the dugout, the BU called the runner out, stating he did not touch the plate. Our runner of course says that he did, but my question is: Shouldn't that have had to be challenged by the opposing team? They didn't challenge, and it was the third out. We lost the game 9-8 due to this ruling.