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 | Overall | Player | Position | School/Club Team |
| --- | --- | --- | --- | --- |
| 1.0 | 3.0 | Mike Phipps | Quarterback | Purdue |
| 1.0 | 21.0 | Bob McKay | Tackle | Texas |
| 2.0 | 36.0 | Turkey Jones | Defensive End | Tennessee State |
| 2.0 | 47.0 | Jerry Sherk | Defensive Tackle | Oklahoma State |
| 4.0 | 99.0 | Ricky Stevenson | Defensive Back | Arizona |
| 5.0 | 125.0 | Steve Engel | Running Back | Colorado |
| 6.0 | 151.0 | Mike Cilek | Quarterback | Iowa |
| 7.0 | 177.0 | Craig Wycinski | Guard | Michigan State |
| 8.0 | 203.0 | Honester Davidson | Defensive Back | Bowling Green |
| 9.0 | 229.0 | Geoff Brown | Linebacker | Pittsburgh |
| 10.0 | 255.0 | William Yanchar | Defensive Tackle | Purdue |
| 11.0 | 281.0 | Gene Benner | Wide Receiver | Maine |
| 12.0 | 307.0 | Jerry Sanders | Kicker | Texas Tech |
| 13.0 | 333.0 | Larry Roberts | Running Back | Central Missouri |
| 14.0 | 359.0 | Jim Tharpe | Linebacker | Lincoln (Mo.) |
| 15.0 | 385.0 | Guy Homoly | Defensive Back | Illinois State |
| 16.0 | 410.0 | John Redebaugh | Tight End | Bemidji State |
| 17.0 | 436.0 | Charles Tabb | Running Back | McMurry |
Question:
What School or Club team has an overall score of 21?
Answer:
Texas