swimJonathon Xu
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 24.15 | BB+0.06s to A | 2024-11-09 | 24th Annual Tyr Red, White, and Blue Classic venue |
| 100 Freestyle | SCY | 51.85 | A+1.46s to AA | 2025-03-21 | 2025 ULTRA Championship Meet fast pool |
| 200 Freestyle | SCY | 1:53.67 | A+2.48s to AA | 2024-11-10 | 24th Annual Tyr Red, White, and Blue Classic venue |
| 500 Freestyle | SCY | 5:18.11 | BB+3.22s to A | 2024-11-17 | 2024 SAC Thanksgiving Classic ABC Meet venue |
| 50 Backstroke | SCY | 27.92 | BB+1.13s to A | 2025-03-21 | 2025 ULTRA Championship Meet fast pool |
| 100 Backstroke | SCY | 58.44 | BB+1.15s to A | 2025-03-23 | 2025 ULTRA Championship Meet fast pool |
| 200 Backstroke | SCY | 2:07.27 | BB+2.08s to A | 2025-03-22 | 2025 ULTRA Championship Meet fast pool |
| 50 Breaststroke | SCY | 33.38 | BB+2.49s to A | 2025-10-05 | 2025 LIFE & ROYAL Fall Frenzy venue |
| 100 Breaststroke | SCY | 1:09.79 | BB+5.10s to A | 2024-11-08 | 24th Annual Tyr Red, White, and Blue Classic |
| 50 Butterfly | SCY | 26.31 | A+0.72s to AA | 2026-03-07 | 2026 Lake Huron Regional Meet fast pool |
| 100 Butterfly | SCY | 59.18 | BB+2.49s to A | 2026-03-08 | 2026 Lake Huron Regional Meet fast pool |
| 200 Individual Medley | SCY | 2:09.81 | BB+1.62s to A | 2024-11-09 | 24th Annual Tyr Red, White, and Blue Classic venue |
| 400 Individual Medley | SCY | 4:45.28 | BB+9.29s to A | 2024-10-05 | 2024 LIFE & ROYAL Fall Frenzy venue |
| 50 Backstroke | SCM | 32.61 | B+0.52s to BB | 2025-08-05 | August 2025 Life Time Michigan Intersquad venue |
| 200 Backstroke | SCM | 2:25.53 | BB+7.14s to A | 2024-11-14 | Life Time Michigan Turkey Trot venue |
| 50 Breaststroke | SCM | 43.41 | +3.62s to B | 2025-08-05 | August 2025 Life Time Michigan Intersquad venue |
| 50 Butterfly | SCM | 32.88 | B+0.89s to BB | 2025-08-05 | August 2025 Life Time Michigan Intersquad venue |
| 200 Butterfly | SCM | 2:46.03 | +1.64s to B | 2024-11-14 | Life Time Michigan Turkey Trot venue |
| 50 Freestyle | LCM | 27.59 | A+0.90s to AA | 2024-06-01 | 2024 PCC Cruisin into Summer venue |
| 100 Freestyle | LCM | 59.35 | A+1.26s to AA | 2024-07-26 | 2024 LCM ULTRA Championship Meet fast pool |
| 200 Freestyle | LCM | 2:13.67 | BB+0.38s to A | 2024-06-02 | 2024 PCC Cruisin into Summer venue |
| 400 Freestyle | LCM | 4:45.54 | BB+1.25s to A | 2025-07-13 | 2025 Grizzly Summer Sizzler venue |
| 800 Freestyle | LCM | 9:49.16 | A+22.97s to AA | 2024-07-26 | 2024 LCM ULTRA Championship Meet |
| 50 Backstroke | LCM | 31.99 | A+1.30s to AA | 2024-07-26 | 2024 LCM ULTRA Championship Meet fast pool |
| 100 Backstroke | LCM | 1:08.79 | BB+1.30s to A | 2024-07-28 | 2024 LCM ULTRA Championship Meet fast pool |
| 200 Backstroke | LCM | 2:26.26 | A+5.27s to AA | 2024-07-27 | 2024 LCM ULTRA Championship Meet fast pool |
| 50 Breaststroke | LCM | 36.17 | BB+1.18s to A | 2024-07-26 | 2024 LCM ULTRA Championship Meet |
| 100 Butterfly | LCM | 1:17.33 | +1.34s to B | 2024-06-01 | 2024 PCC Cruisin into Summer venue |
| 200 Butterfly | LCM | 2:48.98 | B+11.49s to BB | 2024-07-13 | 2024 Grizzly Summer Sizzler venue |
| 200 Individual Medley | LCM | 2:37.83 | BB+9.24s to A | 2024-06-01 | 2024 PCC Cruisin into Summer venue |
| 400 Individual Medley | LCM | 5:32.43 | BB+13.44s to A | 2024-07-12 | 2024 Grizzly Summer Sizzler venue |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 17.
Pool tags are a venue speed heuristic (median deviation of all swims there vs each swimmer's typical time) — see the venue page for the method.
Fastest relay legs
| Leg | Course | Time | Start | Relay | Date | Meet |
|---|---|---|---|---|---|---|
| 50 Freestyle | SCY | 22.84 | flying | 200 Free Relay (leg 4) | 2026-03-07 | 2026 Lake Huron Regional Meet |
| 100 Backstroke | SCY | 57.76 | flat | 400 Medley Relay | 2025-03-22 | 2025 ULTRA Championship Meet |
| 50 Breaststroke | SCY | 30.42 | flying | 200 Medley Relay (leg 2) | 2026-03-08 | 2026 Lake Huron Regional Meet |
Reconstructed from relay split marks. Flat = lead-off (comparable to individual times); flying starts run ~0.5–0.7s fast and are not PRs.
IMX / IMR
IMX 17-18 · LCM
2804 points (5/6 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 400 FR LCM | 4:45.54 | 630 |
| 200 BK LCM | 2:26.26 | 652 |
| 200 FL LCM | 2:48.98 | 407 |
| 200 IM LCM | 2:37.83 | 545 |
| 400 IM LCM | 5:32.43 | 570 |
| 200 BR LCM | — | 0 |
IMR 17-18 · SCY
2973 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 200 FR SCY | 1:53.67 | 684 |
| 100 BK SCY | 58.44 | 585 |
| 100 BR SCY | 1:09.79 | 516 |
| 100 FL SCY | 59.18 | 570 |
| 200 IM SCY | 2:09.81 | 618 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
100 Freestyle SCY 51.85
Front half 25.05s · back half 26.80s
200 Freestyle SCY 1:53.67
Front half 53.88s · back half 59.79s
500 Freestyle SCY 5:18.11
Front half 154.70s · back half 163.41s
100 Backstroke SCY 58.44
Front half 28.56s · back half 29.88s
200 Backstroke SCY 2:07.27
Front half 61.88s · back half 65.39s
100 Butterfly SCY 59.18
Front half 26.90s · back half 32.28s
200 Individual Medley SCY 2:09.81
400 Individual Medley SCY 4:45.28
Front half 135.13s · back half 150.15s
100 Freestyle LCM 59.35
Front half 28.74s · back half 30.61s
200 Freestyle LCM 2:13.67
Front half 65.40s · back half 68.27s
400 Freestyle LCM 4:45.54
Front half 138.55s · back half 146.99s
100 Backstroke LCM 1:08.79 RT 0.65s
Front half 33.51s · back half 35.28s
200 Backstroke LCM 2:26.26 RT 0.82s
Front half 70.26s · back half 76.00s
100 Butterfly LCM 1:17.33
Front half 33.05s · back half 44.28s
200 Butterfly LCM 2:48.98
Front half 81.44s · back half 87.54s
200 Individual Medley LCM 2:37.83
Front half 72.65s · back half 85.18s
400 Individual Medley LCM 5:32.43
Front half 159.50s · back half 172.93s
Reaction time
From electronically-timed starts only (~2% of corpus swims carry a reaction time). PRs with a recorded reaction show an RT chip in the splits section above.
Progression
Faster times are higher. One card per event, all courses & history.