Dean, Mark
Current rating: 1366
Record: 6-14-1 (GP) / 3-4 (professional)
| Grand Prix Las Vegas 2019 (limited) (MH1 limited) | starting rating: 1395 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 346 | Chatfield, Lawrence (1625) | Lost 0-2 | -141381 |
| 2sealed | 333 | Hibbs, David (1548) | Lost 1-2 | -151366 |
| top | average opponent: 1586record: 0-2 | new rating: 1366 | ||
| Grand Prix Oklahoma City 2013 (THS limited) | starting rating: 1412 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 296 | Caswell, Thomas (1500) | Lost 1-2 | -171395 |
| top | record: 0-1 | new rating: 1395 | ||
| Grand Prix Denver 2008 (Lorwyn block) | starting rating: 1463 | |||
| round | table | opponent (rating) | result | Δrating |
| 2block | 122 | Lee, Alex (1475) | Lost 0-2 | -181445 |
| 3block | 183 | Atkinson, Kalani (1511) | Lost 0-2 | -171428 |
| 4block | 240 | Thompson, Keith (1513) | Lost 0-2 | -161412 |
| top | average opponent: 1499record: 0-3 | new rating: 1412 | ||
| Pro Tour Yokohama 2007 (Time Spiral block) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 132 | Moreno, Daniel (1500) | Lost 1-2 | -181446 |
| 2block | 133 | Ogata, Shouichirou (1469) | Lost 1-2 | -171429 |
| 3block | 143 | Ozkara, Mehmet (1471) | Lost 1-2 | -171412 |
| 5block | 117 | Kastle, Darwin (1497) | Won 2-1 | +191431 |
| 6block | 87 | Bustamante, Analynn (1690) | Won 2-1 | +231454 |
| 7block | 74 | Gin, Ryan (1590) | Won 2-1 | +201474 |
| 8block | 51 | Thompson, Mike (1839) | Lost 0-2 | -111463 |
| top | average opponent: 1579record: 3-4 | new rating: 1463 | ||
| Grand Prix Dallas 2007 (extended) | starting rating: 1481 | |||
| round | table | opponent (rating) | result | Δrating |
| 3extended | 44 | Stemmer, Arno (1518) | Lost 0-0 | -171464 |
| 4extended | 201 | Aranami, Naoto (1472) | Won 2-0 | +181482 |
| 5extended | 112 | Martinez, Peter (1473) | Lost 1-2 | -181464 |
| top | average opponent: 1488record: 1-2 | new rating: 1464 | ||
| Grand Prix St. Louis 2006 (CSP limited) | starting rating: 1519 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 7 | Gilley, Jonathan (1516) | Won 2-1 | +181537 |
| 2sealed | 103 | Langford, Chris (1452) | Lost 0-2 | -191518 |
| 3sealed | 146 | Stott, Cameron (1500) | Lost 1-2 | -191499 |
| 4sealed | 161 | Stroh, Matthew (1481) | Lost 0-2 | -181481 |
| top | average opponent: 1487record: 1-3 | new rating: 1481 | ||
| Grand Prix Austin 2004 (COK limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 19 | Menzer, Tony (1661) | Won 2-0 | +211521 |
| 2sealed | 21 | Johnson, Eric (1518) | Draw 1-1 | 01521 |
| 3sealed | 57 | Harvey, Christopher (1500) | Won 2-0 | +171538 |
| 4sealed | 56 | Pelcak, John (1592) | Lost 0-2 | -171521 |
| 5sealed | 89 | Sanchez, Kyle (1502) | Won 2-1 | +181539 |
| 6sealed | 57 | Karasoulis, Mikhail (1454) | Won 2-1 | +171556 |
| 7sealed | 36 | Lunsford, Alan (1557) | Lost 1-2 | -181538 |
| 8sealed | 56 | Mason, Jim (1525) | Lost 1-2 | -191519 |
| top | average opponent: 1539record: 4-3-1 | new rating: 1519 | ||