Table schema:
CREATE TABLE table_name_88 (pick INTEGER, position VARCHAR, round VARCHAR, school_club_team VARCHAR)

Question: Which Pick has a Round larger than 1, a School/Club Team of alcorn state, and a Position of defensive back?
SQL: SELECT SUM(pick) FROM table_name_88 WHERE round > 1 AND school_club_team = "alcorn state" AND position = "defensive back"