CREATE TABLE table_44739 ("Coach" TEXT, "First Yr" FLOAT, "Last Yr" FLOAT, "W-L%" FLOAT, "G > .500" FLOAT, "Yr plyf" FLOAT, "G plyf" FLOAT, "W plyf" FLOAT, "L plyf" FLOAT)

What is the average last yr with an l plyf less than 0?
SELECT AVG("Last Yr") FROM table_44739 WHERE "L plyf" < '0'
SELECT AVG("Last Yr") FROM "table_44739" WHERE "L plyf" < '0'