| Clue | Source | Date |
|---|---|---|
| Gridiron penalty-calling whistler | Newsday | 21 Sep 2020 |
| *Gridiron official | Wall Street Journal | 18 May 2020 |
| Touchdown caller | Newsday | 06 Nov 2019 |
| Gridiron adjudicator | LA Times Daily | 12 Dec 2016 |
| Worker who carries a whistle | The Washington Post | 01 Feb 2016 |
| Athletics whistleblower | Newsday | 07 Jan 2016 |
| Gridiron adjudicator | ||
| Worker with a whistle |