CREATE TABLE table_17613 ("Country" TEXT, "Player name" TEXT, "Period" TEXT, "Position" TEXT, "Matches" TEXT, "Goals" TEXT)

What is the name of the player who played in 2009 only?
SELECT "Player name" FROM table_17613 WHERE "Period" = '2009'
SELECT "Player name" FROM "table_17613" WHERE "Period" = '2009'