CREATE TABLE table_15864 ("Player" TEXT, "No." FLOAT, "Nationality" TEXT, "Position" TEXT, "Years in Toronto" TEXT, "School/Club Team" TEXT)

What number is the player that played 1998-2001
SELECT MIN("No.") FROM table_15864 WHERE "Years in Toronto" = '1998-2001'
SELECT MIN("No.") FROM "table_15864" WHERE "Years in Toronto" = '1998-2001'