user: ### NOW ANSWER:
Question: What is mark grieb's average when his TDs are smaller than 2?
Columns: ['Player', 'Car.', 'Yards', 'Avg.', "TD's", 'Long']
Types: ['text', 'real', 'real', 'real', 'real', 'real']
Sample row: ['Brian Johnson', 44.0, 100.0, 2.3, 9.0, 20.0]
SQL:

assistant: SELECT SUM("Avg.") FROM "Table" WHERE "Player" = 'mark grieb' AND "TD's" < 2.0;