| Clue | Source | Date |
|---|---|---|
| Powerful 1970s Pittsburgh defensive line, familiarly | LA Times Daily | 13 Apr 2017 |
| Powerful 1970s Pittsburgh defensive line, familiarly | The Washington Post | 13 Apr 2017 |
| Powerful 1970s Pittsburgh defensive line, familiarly | ||
| NFL Pittsburgh defense in the 1970s | ||
| Pittsburgh's defensive line, in the 1970s |