Sanctioned Matchup Predictor
Tom Koster vs Dianne O'Brien
Past Head-to-Head Rubbers (4)
| Winner | Loser | Score | Event | Rating Delta | |
|---|---|---|---|---|---|
| Tom Koster | def. | Dianne O'Brien | BDTTA C Grade Summer Pennant 2023 Round 8 (2023-03-30) | +8 | |
| Tom Koster | def. | Dianne O'Brien | BDTTA C Grade Rnd 3 Winter-Summer Pennant 2022 (2022-07-28) | +33 | |
| Tom Koster | def. | Dianne O'Brien | BDTTA C Grade Rnd 10 Winter-Summer Pennant 2022 (2022-09-15) | +10 | |
| Tom Koster | def. | Dianne O'Brien | BDTTA C Grade Summer Pennant 2023 Round 1 (2023-02-09) | +10 |