CREATE TABLE table_50032 ("Res." TEXT, "Record" TEXT, "Opponent" TEXT, "Method" TEXT, "Event" TEXT, "Round" FLOAT, "Time" TEXT, "Location" TEXT)

Name the lowest Round with Opponent of rolando delgado?
SELECT MIN("Round") FROM table_50032 WHERE "Opponent" = 'rolando delgado'
SELECT MIN("Round") FROM "table_50032" WHERE "Opponent" = 'rolando delgado'