Table schema:
CREATE TABLE table_1850339_2 (season VARCHAR, army___navy_score VARCHAR)

Question: How many different season have an Army - Navy score of 10 dec. 2016 at Baltimore, MD (M&T Bank Stadium)?
SQL: SELECT COUNT(season) FROM table_1850339_2 WHERE army___navy_score = "10 Dec. 2016 at Baltimore, MD (M&T Bank Stadium)"