| event | round | table | player one | result | player two |
| Grand Prix Atlanta 2011 | 15 | 18 | Manfield, Seth (1957) | ID | Cox, Patrick (1867) |
| Grand Prix Indianapolis 2013 | 6 | 292 | Manfield, Seth (1970) | Won 2-1 | Cox, Patrick (1889) |
| Grand Prix Atlanta 2014 | 11 | 159 | Manfield, Seth (1996) | Lost 1-2 | Cox, Patrick (1872) |
| Grand Prix Washington DC 2014 | 6 | 73 | Manfield, Seth (2004) | Won 2-1 | Cox, Patrick (1928) |
| Grand Prix Oklahoma City 2017 | 7 | 1 | Manfield, Seth (2122) | Won 2-0 | Cox, Patrick (1647) |