In baseball, the fourth out is a legal out made by the defense after three outs in a half-inning already have been recorded. According to the rules, the third out does not cause the ball to become dead; if the fielders make a subsequent out that prevents a run from scoring, this out will supersede the apparent third out, thus becoming the recorded third out. For statistical purposes, the apparent third out is "undone" and the fourth out's result is recorded instead. This is not the same as Four Strikeouts in an Inning.