Holtsberry, Brent
Current rating: 1408
| Grand Prix San Francisco 2007 (Time Spiral block) | starting rating: 1418 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 113 | Miller, Chris (1483) | Won 2-0 | +201438 |
| 2block | 98 | Hawkins, Charlie (1562) | Lost 0-2 | -161422 |
| 3block | 188 | Arucan, Mark (1500) | Lost 0-2 | -171405 |
| 4block | 258 | Benedetti, Michael (1463) | Won 2-1 | +191424 |
| 5block | 216 | Lewis, Jeremy (1516) | Lost 1-2 | -161408 |
| top | average opponent: 1505record: 2-3 | new rating: 1408 | ||
| Grand Prix Oakland 2004 (DST limited) | starting rating: 1428 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 144 | Abrams, Matt (1578) | Won 2-0 | +211449 |
| 2sealed | 87 | Holden, Eric (1556) | Lost 0-2 | -171432 |
| 3sealed | 83 | Burks, John (1499) | Won 2-1 | +201452 |
| 4sealed | 118 | Wilkie, Steve (1532) | Lost 0-2 | -171435 |
| 5sealed | 110 | Plurkowski, Luke (1502) | Lost 1-2 | -171418 |
| top | average opponent: 1533record: 2-3 | new rating: 1418 | ||
| Grand Prix Phoenix 2000 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 18 | Smith, Sean (1471) | Lost 1-2 | -191481 |
| 2extended | 50 | Vennard, Matt (1481) | Lost 0-2 | -181463 |
| 3extended | 70 | Byhoff, Michael (1464) | Lost 1-2 | -181445 |
| 4extended | 96 | McCauley, A. Scott (1444) | Won 2-1 | +181463 |
| 5extended | 87 | Rickard, Sarah (1464) | Lost 1-2 | -181445 |
| 7extended | 71 | St. Clair, Jeremy (1465) | Lost 0-2 | -171428 |
| top | average opponent: 1465record: 1-5 | new rating: 1428 | ||