Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_1637041_2 ( avg_start VARCHAR, winnings VARCHAR )

### Question ###
What are the average start(s) when he had $1,663,868?

### Accurate SQL ###

SELECT avg_start FROM table_1637041_2 WHERE winnings = "$1,663,868"