SELECT MAX("Highest") FROM table_35552 WHERE "Average" = '615' AND "Capacity" > '4,000'
What's the highest with a capacity of greater than 4,000 and an average of 615?
CREATE TABLE table_35552 (
    "Team" text,
    "Stadium" text,
    "Capacity" real,
    "Highest" real,
    "Lowest" real,
    "Average" real
)