Question: What club received a DF player for Free?
SQL: SELECT "To club" FROM "2-17370522-16" WHERE "Transfer fee" = 'Free' AND "Pos." = 'DF';

Question: Which player was transferred to Reggina?
SQL: SELECT "Player" FROM "2-17370522-16" WHERE "To club" = 'Reggina';

Question: What is the exit date of the player transferred to Reggina for Free?
SQL: SELECT "Exit Date" FROM "2-17370522-16" WHERE "Transfer fee" = 'Free' AND "To club" = 'Reggina';