| Clue | Source | Date |
|---|---|---|
| Football field marking | USA Today | 03 Mar 2021 |
| Football field marking | New York Times | 03 Oct 2018 |
| Gridiron marker | New York Times | 19 Sep 2018 |
| Gridiron marker | ||
| Football field marking | ||
| Gridiron marking | Wall Street Journal | 21 May 2016 |
| "Now he's spotted the pizza delivery boy, who's through the gate and crossing the ___!" | ||
| Grid marking |