Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_21100348_15 (rank INTEGER, player VARCHAR)
### Question:
What rank does Rodney Marsh have?
### Answer:
SELECT MAX(rank) FROM table_21100348_15 WHERE player = "Rodney Marsh"