CREATE TABLE table_204_27 (id DECIMAL, "name" TEXT, "position" TEXT, "year" TEXT, "league\ apps" DECIMAL, "league\ goals" DECIMAL, "total\ apps" DECIMAL, "total\ goals" DECIMAL, "notes" TEXT)

how many years did syd bycroft spend playing for doncaster ?
SELECT "year" - "year" FROM table_204_27 WHERE "name" = 'syd bycroft'
SELECT "year" - "year" FROM "table_204_27" WHERE "name" = 'syd bycroft'