CREATE TABLE table_2508633_2 (pick__number NUMBER, position VARCHAR2, nfl_team VARCHAR2)

Name the most pick number for guard and kansas city chiefs
SELECT MAX(pick__number) FROM table_2508633_2 WHERE position = "Guard" AND nfl_team = "Kansas City Chiefs"
SELECT MAX("pick__number") FROM "table_2508633_2" WHERE "Guard" = "position" AND "Kansas City Chiefs" = "nfl_team"