Pentecost, Mark
Current rating: 1517
Record: 10-10
| Grand Prix Las Vegas 2017 (limited) (AKH limited) | starting rating: 1531 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 204 | Jansson, Filip (1528) | Won 2-1 | +181549 |
| 4sealed | 44 | Wedell, Joshua (1518) | Won 2-0 | +171566 |
| 5sealed | 94 | Hosseini, Adrian (1507) | Lost 0-2 | -191547 |
| 6sealed | 79 | Israelsson, Daniel (1679) | Lost 1-2 | -161531 |
| 7sealed | 303 | Styskal, Matthew (1636) | Won 2-1 | +201551 |
| 8sealed | 297 | Rigatti, Jonathan (1505) | Lost 1-2 | -181533 |
| 9sealed | 250 | Jardine, Mike (1547) | Won 2-1 | +181551 |
| 10draft | 175 | Groat, Josh (1570) | Lost 0-2 | -181533 |
| 11draft | 162 | Zyla, Sarah (1663) | Lost 1-2 | -151518 |
| 12draft | 38 | Almeida, Marcela (1545) | Won 2-1 | +181536 |
| 13draft | 111 | Rigatti, Jamie (1502) | Lost 0-2 | -191517 |
| average opponent: 1564record: 5-6 | new rating: 1517 | |||
| Grand Prix Las Vegas 2015 (1) (MM2 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 74 | Thurgood, Jared (1500) | Won 2-0 | +181518 |
| 2sealed | 81 | Levin, Will (1646) | Won 2-0 | +201538 |
| 3sealed | 74 | Robidoux, Marc-Andre (1620) | Lost 1-2 | -161522 |
| 4sealed | 144 | Hsu, Charlie (1537) | Won 2-1 | +181540 |
| 5sealed | 103 | Rodrigues, Hugo (1779) | Won 2-0 | +221562 |
| 6sealed | 54 | Romero, Francisco (1557) | Won 2-0 | +181580 |
| 7sealed | 46 | Dubois, Joe (1731) | Lost 1-2 | -151565 |
| 8sealed | 68 | Williams, Douglas (1614) | Lost 0-2 | -171548 |
| 9sealed | 69 | Sundholm, Peter (1595) | Lost 0-2 | -171531 |
| average opponent: 1620record: 5-4 | new rating: 1531 | |||