CREATE TABLE table_20862 ("Player" TEXT, "No." FLOAT, "Nationality" TEXT, "Position" TEXT, "Years for Grizzlies" TEXT, "School/Club Team" TEXT)

How many nationalities does athlete Casey Jacobsen have?
SELECT COUNT("Nationality") FROM table_20862 WHERE "Player" = 'Casey Jacobsen'
SELECT COUNT("Nationality") FROM "table_20862" WHERE "Player" = 'Casey Jacobsen'