CREATE TABLE table_31887 ("Round" FLOAT, "Pick #" FLOAT, "Player" TEXT, "Position" TEXT, "College" TEXT)

What was the latest round with a running back from a California college?
SELECT MAX("Round") FROM table_31887 WHERE "Position" = 'running back' AND "College" = 'california'
SELECT MAX("Round") FROM "table_31887" WHERE "College" = 'california' AND "Position" = 'running back'