The Office of the Commissioner of Baseball announced today that Minor League first baseman Mike Jacobs of the Colorado Rockies organization has received a 50-game suspension after testing positive for Human Growth Hormone (hGH), a performance-enhancing substance, in violation of the Minor League Drug Prevention and Treatment Program.

The suspension of Jacobs, who is currently with Triple-A Colorado Springs of the Pacific Coast League, is effective immediately.

This story was not subject to the approval of Major League Baseball or its clubs.