Statistics plays an important role in all areas of sports as a method of keeping track of players performances. What also plays a role in sports are performance-enhancing drugs. Major League Baseball has made attempts to rid baseball of these illegal substances by implementing drug tests, but unfortunately the problem persists. The purpose of this thesis is to findan effective way of determining steroid use in baseball based on players batting statistics. A comparison will be made between two groups of Major League Baseball players: those who have ever been suspended for the use of or involvement with performance-enhancing drugs and those who have never been suspended for nor suspected of performance-enhancing drug use. The results will be used to determine the status of a third group of Major League Baseball players, those who have ever been suspected of steroid use.