| event | round | table | player one | result | player two |
| Grand Prix Dallas 2007 | 6 | 12 | Walls, Gabe (1862) | Draw 1-1 | Piazza, Brett (1541) |
| Grand Prix Kansas City 2008 | 10 | 11 | Walls, Gabe (1939) | Lost 1-2 | Piazza, Brett (1664) |
| Grand Prix Kansas City 2008 | 15 | 21 | Walls, Gabe (1937) | Lost 0-2 | Piazza, Brett (1689) |