Question: What was the margin of victory at the Texas International Open?
SQL: SELECT "Margin of victory" FROM "2-1510351-1" WHERE "Tournament" = 'Texas International Open';

Question: What was the margin of victory in the tournament with a winning score of −3 (74-68-72-71=285)?
SQL: SELECT "Margin of victory" FROM "2-1510351-1" WHERE "Winning score" = '−3 (74-68-72-71=285)';