Kostov, John
Current rating: 1445
Record: 1-4
| Grand Prix Las Vegas 2013 (MMA limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 1387 | Jeffery, Richard (1519) | Lost 0-2 | -181482 |
| 2sealed | 1513 | Nowak, Chris (1482) | Won 2-0 | +181500 |
| 3sealed | 1629 | Greer, Shannon (1468) | Lost 1-2 | -181482 |
| 4sealed | 1640 | Crowley, Dave (1460) | Lost 1-2 | -191463 |
| 5sealed | 1423 | Strobel, Aaron (1465) | Lost 0-2 | -181445 |
| average opponent: 1479record: 1-4 | new rating: 1445 | |||