CREATE TABLE table_31691 ("Pick #" FLOAT, "MLS team" CLOB, "Player" CLOB, "Position" CLOB, "Affiliation" CLOB)

Tell me the sum of pick number for kenny arena
SELECT SUM("Pick #") FROM table_31691 WHERE "Player" = 'kenny arena'
SELECT SUM("Pick #") FROM "table_31691" WHERE "Player" = 'kenny arena'