What position did the 2010-11 USA ír player have?
CREATE TABLE "defensive_player_of_the_year" (
  "season" text,
  "player" text,
  "position" text,
  "nationality" text,
  "team" text
);
SELECT "position" FROM "defensive_player_of_the_year" WHERE "nationality"='usa' AND "team"='ír' AND "season"='2010-11';