| Clue | Source | Date |
|---|---|---|
| Pitching stats | Wall Street Journal | 25 Sep 2019 |
| Pitching stats | ||
| Blots on a pitcher's record | The Washington Post | 05 Dec 2015 |
| Blots on a pitcher's record | ||
| They determine a pitcher's "average" | ||
| They determine a pitcher's "average" | ||
| Baseball scores. |