| event | round | table | player one | result | player two |
| Grand Prix Denver 2008 | 13 | 4 | Turtenwald, Owen (1882) | Won 2-0 | Saito, Tomoharu (1859) |
| Grand Prix Washington DC 2014 | 10 | 46 | Turtenwald, Owen (2133) | Won 2-1 | Saito, Tomoharu (2041) |
| Grand Prix Ottawa 2014 | 9 | 62 | Turtenwald, Owen (2131) | Won 2-1 | Saito, Tomoharu (1955) |
| Grand Prix Richmond 2018 (leg) | 13 | 2010 | Turtenwald, Owen (2118) | Lost 1-2 | Saito, Tomoharu (1985) |
| Grand Prix Atlanta 2018 | 13 | 114 | Turtenwald, Owen (2032) | Lost 1-2 | Saito, Tomoharu (1983) |