user: Question: What is the total number of overall draft picks for fred nixon?
Columns: ['Round', 'Overall', 'Player', 'Position', 'College']
Types: ['real', 'real', 'text', 'text', 'text']
Sample row: [1.0, 4.0, 'Bruce Clark', 'DT', 'Penn State']
SQL:

assistant: SELECT COUNT("Overall") FROM "Table" WHERE "Player" = 'fred nixon';