ATLANTA — Georgia Tech coach Brian Gregory says guard Corey Heyward is expected to miss the 2012-13 season after tearing a ligament in his left knee in a pickup game. Heyward, a former standout at Peachtree Ridge High School, signed with Georgia Tech after spending one year at Hargrave Military Academy in Virginia. Gregory said Monday Heyward tore his left anterior cruciate ligament on Thursday and will have surgery in the next two weeks.