CREATE TABLE table_52702 ("Player" TEXT, "Car." FLOAT, "Yards" FLOAT, "Avg." FLOAT, "TD's" FLOAT, "Long" FLOAT)

What is Craig Whelihan's average when his yards are smaller than 0?
SELECT SUM("Avg.") FROM table_52702 WHERE "Player" = 'craig whelihan' AND "Yards" < '0'
SELECT SUM("Avg.") FROM "table_52702" WHERE "Player" = 'craig whelihan' AND "Yards" < '0'