Perna, John
Current rating: 1474
Record: 4-6
| Grand Prix Tampa Bay 2019 (modern) | starting rating: 1468 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 43 | Cope, Zachary (1512) | Lost 1-2 | -181450 |
| 2modern | 284 | Lomangino, Stephen (1550) | Won 2-0 | +201470 |
| 3modern | 375 | Budkey, Thomas (1500) | Won 2-1 | +191489 |
| 4modern | 197 | Giering, Cole (1518) | Lost 0-2 | -181471 |
| 5modern | 336 | Lawson, Duncan (1355) | Won 2-0 | +161487 |
| 6modern | 211 | Richmann, Adrian (1743) | Lost 0-2 | -131474 |
| average opponent: 1530record: 3-3 | new rating: 1474 | |||
| Grand Prix Orlando 2017 (AER limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 689 | Ferruggia, Jesse (1500) | Lost 0-2 | -181482 |
| 2sealed | 879 | Moo Young, Laurence (1725) | Lost 0-2 | -141468 |
| 3sealed | 1136 | Jerrett, Duncan (1465) | Won 2-1 | +181486 |
| 4sealed | 1043 | Bundy, Johnathon (1454) | Lost 0-2 | -181468 |
| average opponent: 1536record: 1-3 | new rating: 1468 | |||