CREATE TABLE table_16889 ("Year" FLOAT, "Championship" TEXT, "54 holes" TEXT, "Winning score" TEXT, "Margin of victory" TEXT, "Runner ( s ) -up" TEXT)

What tournament did Tiger hold a 2 shot lead after 54 holes?
SELECT "Championship" FROM table_16889 WHERE "54 holes" = '2 shot lead'
SELECT "Championship" FROM "table_16889" WHERE "54 holes" = '2 shot lead'