Marsh, Calvin
Current rating: 1430
Record: 2-6
| Grand Prix Pittsburgh 2015 (modern) | starting rating: 1465 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 45 | Hildreth, Brian (1500) | Lost 0-2 | -181447 |
| 2modern | 1050 | Ruiz, Alex (1430) | Won 2-1 | +181465 |
| 3modern | 607 | Barror, Stephen (1502) | Lost 1-2 | -171448 |
| 4modern | 846 | Neal, Derek (1481) | Lost 1-2 | -181430 |
| average opponent: 1478record: 1-3 | new rating: 1430 | |||
| Grand Prix Cleveland 2015 (FRF limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 389 | Radivoyevitch, Evan (1500) | Lost 1-2 | -181482 |
| 2sealed | 517 | Garlock, James (1404) | Lost 0-2 | -191463 |
| 4sealed | 601 | Tillman, Justin (1481) | Won 2-0 | +181481 |
| 5sealed | 554 | Franklin, Eric (1586) | Lost 0-2 | -161465 |
| average opponent: 1493record: 1-3 | new rating: 1465 | |||