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

### Instruction:
What is the total round when DB was the position, and the pick less than 21, and Jeff Welch as the name?

### Inputs:
table_name: table, columns: ['Round', 'Pick', 'Overall', 'Name', 'Position', 'College']

### Response:
SELECT SUM Round FROM table WHERE Position = db AND Name = jeff welch AND Pick < 21