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_9315 ( "Round" real, "Pick #" real, "Player" text, "Position" text, "College" text )

### Question ###
A Round larger than 1, a College of Oklahoma state, and a average Pick # that has a Position of tight end is what?

### Accurate SQL ###

SELECT AVG("Pick #") FROM table_9315 WHERE "Position" = 'tight end' AND "College" = 'oklahoma state' AND "Round" > '1'