Marks, Jason
Current rating: 1632
Record: 8-8-2 (GP) / 15-10-1 (professional)
| Grand Prix Philadelphia 2002 (ONS rochester) | starting rating: 1625 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 165 | Napoli, Phillip (1543) | Won 2-0 | +171642 |
| 2sealed | 105 | Mazza, David (1480) | Won 2-1 | +151657 |
| 3sealed | 88 | Ksepka, Daniel (1501) | Lost 0-2 | -211636 |
| 4sealed | 159 | McGee, Thorin (1519) | Won 2-0 | +161652 |
| 5sealed | 130 | Crespo, Freddie (1539) | Lost 0-2 | -201632 |
| top | average opponent: 1517record: 3-2 | new rating: 1632 | ||
| Grand Prix Detroit 2001 (PLS limited) | starting rating: 1616 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 100 | Jefferson, David (1518) | Won 2-0 | +161632 |
| 3sealed | 60 | Marchand, Richard (1536) | Draw 1-1 | -11631 |
| 4sealed | 83 | Greenstein, Jordan (1537) | Draw 1-1 | -21629 |
| 5sealed | 130 | Kasunich, Rodney (1535) | Won 2-1 | +161645 |
| 6sealed | 82 | Lane, Adam E (1537) | Lost 0-2 | -201625 |
| top | average opponent: 1533record: 2-1-2 | new rating: 1625 | ||
| Pro Tour New York 2000 (Masques block) | starting rating: 1469 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 7 | Bastos, Frederico (1530) | Won 2-0 | +191488 |
| 2block | 47 | Roderer, Dave (1684) | Won 2-1 | +221510 |
| 3block | 12 | Bregoli, Mike (1646) | Won 2-0 | +201530 |
| 4block | 10 | Hirabayashi, Kazuya (1556) | Lost 1-2 | -171513 |
| 5block | 40 | Mello, Patrick (1678) | Won 2-0 | +211534 |
| 6block | 20 | Jensen, William (1945) | Lost 0-2 | -111523 |
| 7block | 23 | Meinecke, Holger (1732) | ID | 01523 |
| 8block | 26 | Ross, Edward (1494) | Won 2-0 | +171540 |
| 9block | 24 | Rumsey, Michael (1634) | Won 2-0 | +201560 |
| 10block | 14 | Mitchell, Andrew [ZAF] (1599) | Draw 1-1 | +11561 |
| 11block | 16 | Ekebom, Erno (1818) | Won 2-0 | +221583 |
| 12block | 10 | Blackwell, Trevor (1851) | Lost 0-2 | -131570 |
| 13block | 16 | Hovi, Tommi (1871) | Won 2-1 | +231593 |
| 14block | 12 | Lo Moro, Raffaele (1850) | Won 2-0 | +231616 |
| top | average opponent: 1706record: 9-3-2 | new rating: 1616 | ||
| Grand Prix Philadelphia 2000 (extended) | starting rating: 1479 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 7 | Anthon, J.R. (1518) | Won 0-0 | +191498 |
| 3extended | 21 | Chapman, Eric (1541) | Lost 0-0 | -171481 |
| 4extended | 80 | Bole, Greg (1519) | Won 0-0 | +181499 |
| 5extended | 99 | Yang, Peter (1520) | Lost 0-0 | -171482 |
| 6extended | 124 | Long, Mike 2 (1801) | Lost 0-0 | -131469 |
| top | average opponent: 1580record: 2-3 | new rating: 1469 | ||
| Grand Prix Memphis 1999 (Urza's block) | starting rating: 1495 | |||
| round | table | opponent (rating) | result | Δrating |
| 3block | 14 | Danziger, Tim (1546) | Won 0-0 | +191514 |
| 4block | 27 | Saylor, David (1554) | Lost 0-0 | -171497 |
| 5block | 59 | Wescoe, Craig (1504) | Lost 0-0 | -181479 |
| top | average opponent: 1535record: 1-2 | new rating: 1479 | ||
| Pro Tour New York 1999 (Urza's block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 89 | Dato, Federico (1671) | Won 2-1 | +211521 |
| 2block | 20 | Duffy, Shane (1520) | Won 2-1 | +181539 |
| 3block | 34 | Comer, Alan (1668) | Won 2-1 | +201559 |
| 4block | 8 | Boulanger, Vincent (1559) | Won 2-1 | +181577 |
| 5block | 4 | Tsang, Terry (1661) | Lost 1-2 | -161561 |
| 6block | 12 | Wolf, Andrew (1483) | Lost 0-2 | -191542 |
| 7block | 24 | Mullor, Jorge (1525) | ID | 01542 |
| 8block | 42 | Weitz, David (1538) | Lost 0-2 | -191523 |
| 9block | 41 | Krouner, Ken (1524) | Won 2-0 | +181541 |
| 10block | 29 | Krakower, Gary (1710) | Won 2-1 | +211562 |
| 11block | 22 | Sullivan, Adrian (1605) | Lost 1-2 | -171545 |
| 12block | 33 | Valleroy, Scott (1534) | Lost 0-2 | -181527 |
| 13block | 35 | Serio, Ronny (1606) | Lost 1-2 | -161511 |
| 14block | 40 | Heiss, Nathan (1663) | Lost 0-2 | -161495 |
| top | average opponent: 1590record: 6-7-1 | new rating: 1495 | ||