The 6-foot-4 junior forward combined for 27 points, 33 rebounds and 11 blocks last week during two Baltimore City League games. The victories, over Reginald Lewis and then-No. 5 Walbrook, improved the Bears' record to 7-8. Carver had won six of its previous seven games before an 82-79 setback to City last night. In the 70-37 rout of Reginald Lewis on Jan. 23, McCullum scored 15 points and grabbed 20 rebounds. In Friday night's win over visiting Walbrook, McCullum had 12 points, 13 rebounds and 11 blocked shots. Also a cross country runner, McCullum is in only his second season of organized basketball, and in his first season...