SEATTLE--(BUSINESS WIRE)--March 30, 2004--Oberto Sausage Company, the Northwest's leading maker of Oh Boy! Oberto Beef Jerky will sponsor Opening Day of Baseball Season at Safeco Field on Tuesday, April 6 at 2:05 p.m. Seattle Mariners Fans will eat up the action as the Miss Oh Boy! Oberto hydroplane makes her season premier during the 4th Inning Video Board Challenge. Look for Art "Oh Boy" Oberto to throw out samples and the first pitch. Every fan will receive a 2004 magnetic Oberto-Mariners baseball schedule as they enter the gates.