How many players with a position are listed for the 2009 season? 
CREATE TABLE table_15463188_17 (position VARCHAR, season VARCHAR)
SELECT COUNT(position) FROM table_15463188_17 WHERE season = "2009"
### Context: CREATE TABLE table_15463188_17 (position VARCHAR, season VARCHAR) ### Question: How many players with a position are listed for the 2009 season?  ### Answer: SELECT COUNT(position) FROM table_15463188_17 WHERE season = "2009"