Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What are the least losses of Mortlake having less than 970 against?

### Inputs:
table_name: table, columns: ['Club', 'Wins', 'Losses', 'Draws', 'Against']

### Response:
SELECT MIN Losses FROM table WHERE Club = mortlake AND Against < 970