Table schema:
CREATE TABLE table_name_23 (league_cup_goals INTEGER, total_goals VARCHAR, league_apps VARCHAR, fa_cup_apps VARCHAR, position VARCHAR)

Question: What is the maximum league cup goals when there has been 0 FA cup appearances, and MF is the position, with 1 league appearance, and smaller than 0 total goals?
SQL: SELECT MAX(league_cup_goals) FROM table_name_23 WHERE fa_cup_apps = "0" AND position = "mf" AND league_apps = "1" AND total_goals < 0