As his teammates watched anxiously, University of Missiouri Tiger Ryan Rallo slid safely into home plate Friday afternoon at Polk DeMent Stadium-Dudy Noble Field. At 2 p.m., Missouri and the University of North Carolina Tarheels opened the May 30-June 1 four-team NCAA regional playoffs. Mississippi State is scheduled to play Middle Tennessee State University at 6 p.m. As 5 p.m. approached, however, the Tigers and Tarheels were tied 3-3 in extra innings.