user: Question: Who was the opponent before week 3 and a result of W 28-6?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'September 6, 1992', 'at Philadelphia Eagles', 'L 15-13', '63,513']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Week" < 3.0 AND "Result" = 'W 28-6';