Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Round | Pick | Overall | Name | Position | College |
| --- | --- | --- | --- | --- | --- |
| 1.0 | 17.0 | 17.0 | Bobby Wilson | DT | Michigan State |
| 3.0 | 21.0 | 76.0 | Ricky Ervins | RB | Southern California |
| 6.0 | 20.0 | 159.0 | Dennis Ransom | TE | Texas A&M |
| 7.0 | 21.0 | 188.0 | Keith Cash | TE | Texas |
| 8.0 | 20.0 | 215.0 | Jimmy Spencer | DB | Florida |
| 9.0 | 20.0 | 243.0 | Charles Bell | DB | Baylor |
| 10.0 | 20.0 | 270.0 | Cris Shale | P | Bowling Green |
| 11.0 | 21.0 | 299.0 | David Gulledge | S | Jacksonville State |
| 12.0 | 20.0 | 326.0 | Keenan McCardell | WR | Nevada-Las Vegas |
Question:
What is the number that is the lowest overall for Round 6?
Answer:
159.0