CREATE TABLE table_name_50 (season VARCHAR2, acquisition_via VARCHAR2, number VARCHAR2)

What is the Season with an Acquisition via of rookie draft, and the number is 15?
SELECT season FROM table_name_50 WHERE acquisition_via = "rookie draft" AND number = "15"
SELECT "season" FROM "table_name_50" WHERE "15" = "number" AND "acquisition_via" = "rookie draft"