It was a 21-months long investigation into drug use in MLB and was headed by former U.S. Senator George Mitchell .
Commissioner of Baseball of an Independent Investigation into the Illegal Use of Steroids and Other Performance Enhancing Substances by Players in Major League Baseball .
Major League Baseball was a 21-months long investigation into drug use in Major League Baseball and was headed by former U.S. Senator George Mitchell .
Commissioner of Baseball of an Independent Investigation into the Illegal Use of Steroids and Other Performance Enhancing Substances by Players in Major League Baseball .