CREATE TABLE table_8083 ("Res." TEXT, "Record" TEXT, "Opponent" TEXT, "Method" TEXT, "Event" TEXT, "Round" FLOAT)

What is Record, when Method is KO, and when Opponent is Rich Guerin?
SELECT "Record" FROM table_8083 WHERE "Method" = 'ko' AND "Opponent" = 'rich guerin'
SELECT "Record" FROM "table_8083" WHERE "Method" = 'ko' AND "Opponent" = 'rich guerin'