CREATE TABLE table_5380 ("Date" CLOB, "Opponent" CLOB, "Score" CLOB, "Loss" CLOB, "Attendance" FLOAT, "Record" CLOB)

Which Attendance is the highest one that has a Record of 15-28?
SELECT MAX("Attendance") FROM table_5380 WHERE "Record" = '15-28'
SELECT MAX("Attendance") FROM "table_5380" WHERE "Record" = '15-28'