Harrison, Michael [USA]
Current rating: 1455
| Grand Prix Oklahoma City 2019 (ELD standard) | starting rating: 1446 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 102 | Barr, Richard (1501) | Lost 1-2 | -171429 |
| 2standard | 112 | Klosterman, Stefan (1812) | Lost 1-2 | -111418 |
| 3standard | 145 | Fuqua, Caleb (1479) | Won 2-0 | +191437 |
| 4standard | 149 | Johnson, Roger (1465) | Won 2-0 | +181455 |
| 5standard | 92 | Crooks, Justin (1451) | Lost 0-0 | -181437 |
| 6standard | 126 | Dunn, Zachary (1450) | Lost 0-2 | -181419 |
| 7standard | 108 | Day, Dani (1465) | Won 2-0 | +191438 |
| 8standard | 92 | Day, Donovan (1376) | Won 2-1 | +171455 |
| top | average opponent: 1500record: 4-4 | new rating: 1455 | ||
| Grand Prix Minneapolis 2019 (modern) | starting rating: 1480 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 343 | Carlson, Malichi (1500) | Lost 0-2 | -181462 |
| 2modern | 335 | Matthias, Scott (1442) | Lost 1-2 | -181444 |
| 3modern | 423 | Hoflock, Jorden (1472) | Won 2-1 | +181462 |
| 4modern | 422 | Smith, Madison (1553) | Lost 1-2 | -161446 |
| top | average opponent: 1492record: 1-3 | new rating: 1446 | ||
| Grand Prix Oklahoma City 2017 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 134 | Ard, Cory (1500) | Won 2-0 | +181518 |
| 2modern | 300 | Eggerss, Nathan (1465) | Lost 1-2 | -191499 |
| 3modern | 387 | Goyne, Jacob (1499) | Lost 0-2 | -181481 |
| 4modern | 551 | Ng, Sherwin (1426) | Lost 1-2 | -191462 |
| 5modern | 548 | Self, Wayne (1468) | Won 2-1 | +181480 |
| 6modern | 487 | Giles, Elijah (1485) | Won 2-0 | +181498 |
| 7modern | 307 | Heymsfield, Christian (1476) | Won 2-0 | +181516 |
| 8modern | 324 | Rhea, Aaron (1473) | Lost 1-2 | -191497 |
| 9modern | 290 | Cox, Brian (1537) | Lost 0-2 | -171480 |
| top | average opponent: 1481record: 4-5 | new rating: 1480 | ||