CREATE TABLE table_77857 ("Date" CLOB, "Opponent" CLOB, "Score" CLOB, "Loss" CLOB, "Attendance" CLOB, "Record" CLOB)

When did tav rez lose?
SELECT "Date" FROM table_77857 WHERE "Loss" = 'tavárez'
SELECT "Date" FROM "table_77857" WHERE "Loss" = 'tavárez'