CREATE TABLE table_204_373 (id DECIMAL, "wager" TEXT, "winner" TEXT, "loser" TEXT, "location" TEXT, "date" TEXT)

only opponent to defeat mocho cota in 1994
SELECT "winner" FROM table_204_373 WHERE "loser" = 'mocho cota' AND "date" = 1994
SELECT "winner" FROM "table_204_373" WHERE "date" = 1994 AND "loser" = 'mocho cota'