CREATE TABLE table_11570261_2 (runner_s__up VARCHAR2, margin_of_victory VARCHAR2)

Who were the runner(s)-up when Tiger won by 11 strokes?
SELECT runner_s__up FROM table_11570261_2 WHERE margin_of_victory = "11 strokes"
SELECT "runner_s__up" FROM "table_11570261_2" WHERE "11 strokes" = "margin_of_victory"