Acting on recommendations made in the Mitchell Report, Major League Baseball adopted a number of security and logistical changes Monday in an effort to combat use of performance-enhancing drugs.

The measures adopted Monday include mandatory random drug tests and background checks for all current and future clubhouse personnel.

In addition, clubs will be required to maintain a log of all packages sent to major league clubhouses.

The commissioner’s office also announced Monday that teams will be required to keep a list of all clubhouse vistors except for members of the Baseball Writers’ Association.