CREATE TABLE table_12930 ("Player" TEXT, "Country" TEXT, "Year ( s )  won" TEXT, "Total" FLOAT, "To par" FLOAT)

Which To par has a Player of jack nicklaus, and a Total smaller than 146?
SELECT AVG("To par") FROM table_12930 WHERE "Player" = 'jack nicklaus' AND "Total" < '146'
SELECT AVG("To par") FROM "table_12930" WHERE "Player" = 'jack nicklaus' AND "Total" < '146'