CREATE TABLE table_31404 ("Name" TEXT, "#" FLOAT, "Position" TEXT, "Height" TEXT, "Weight  (  lb.  ) " FLOAT, "Year" TEXT, "Hometown" TEXT, "Previous School" TEXT)

What year was player number 10?
SELECT "Year" FROM table_31404 WHERE "#" = '10'
SELECT "Year" FROM "table_31404" WHERE "#" = '10'