swimJohn Shackleton
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 26.15 | AA+0.36s to AAA | 2025-12-19 | 2025 SI Winter Age Group Championships |
| 100 Freestyle | SCY | 56.03 | AAA+2.34s to AAAA | 2026-03-30 | 2026 Southwest Age Group Regional fast pool |
| 200 Freestyle | SCY | 2:02.57 | AAA+5.58s to AAAA | 2025-03-07 | 2025 SI 14U AGE GRP CHAMPIONSHIPS |
| 500 Freestyle | SCY | 5:20.08 | AAA+5.09s to AAAA | 2026-03-06 | 2026 SI 14U AGE GRP CHAMPIONSHIPS venue |
| 1000 Freestyle | SCY | 11:16.39 | AAA+13.80s to AAAA | 2025-10-05 | 2025 SI CAST Senior Meet - copied venue |
| 1650 Freestyle | SCY | 18:51.34 | AAA+29.85s to AAAA | 2025-11-24 | 2025 CA MVN Turkey Classic venue |
| 50 Backstroke | SCY | 29.79 | AA+0.10s to AAA | 2025-12-19 | 2025 SI Winter Age Group Championships |
| 100 Backstroke | SCY | 1:02.03 | AAA+2.54s to AAAA | 2026-02-13 | 2026 SI Presidents' Day Senior Classic - copi |
| 200 Backstroke | SCY | 2:15.69 | AAA+6.00s to AAAA | 2026-03-30 | 2026 Southwest Age Group Regional fast pool |
| 50 Breaststroke | SCY | 38.79 | BB+2.10s to A | 2025-11-08 | HSA All Ages NTS venue |
| 100 Breaststroke | SCY | 1:25.61 | B+0.12s to BB | 2025-11-09 | HSA All Ages NTS venue |
| 200 Breaststroke | SCY | 3:05.94 | B+3.55s to BB | 2024-07-20 | 2024 SI RSD BC Last Chance Meet venue |
| 50 Butterfly | SCY | 29.35 | AA+1.16s to AAA | 2026-03-06 | 2026 SI 14U AGE GRP CHAMPIONSHIPS |
| 100 Butterfly | SCY | 1:03.86 | AA+1.37s to AAA | 2026-03-27 | 2026 Southwest Age Group Regional |
| 200 Butterfly | SCY | 2:30.86 | A+5.67s to AA | 2026-01-31 | 2026 SI HSA All Ages NTS Meet fast pool |
| 100 Individual Medley | SCY | 1:03.47 | AAA+2.38s to AAAA | 2026-03-27 | 2026 Southwest Age Group Regional |
| 200 Individual Medley | SCY | 2:15.69 | AAA+3.60s to AAAA | 2026-03-27 | 2026 Southwest Age Group Regional |
| 400 Individual Medley | SCY | 5:00.65 | AA+4.16s to AAA | 2026-01-31 | 2026 SI HSA All Ages NTS Meet fast pool |
| 50 Freestyle | LCM | 27.93 | AAAA | 2025-06-20 | 2025 SI SPLASH AND DASH |
| 100 Freestyle | LCM | 1:03.20 | AAA+1.61s to AAAA | 2026-06-19 | 2026 SI Splash and Dash fast pool |
| 200 Freestyle | LCM | 2:12.93 | AAAA | 2025-08-06 | 2025 Western Zone Age Group LCM Championships |
| 400 Freestyle | LCM | 4:52.60 | AAA+6.71s to AAAA | 2026-06-20 | 2026 SI Splash and Dash fast pool |
| 800 Freestyle | LCM | 9:53.81 | AAAA | 2026-05-23 | SI 2026 TAC CSTE All Ages NTS Meet fast pool |
| 1500 Freestyle | LCM | 18:54.01 | AAAA | 2026-06-27 | 2026 SI MRA LC Distance Meet venue |
| 50 Backstroke | LCM | 34.41 | AA+0.02s to AAA | 2026-06-19 | 2026 SI Splash and Dash fast pool |
| 100 Backstroke | LCM | 1:14.71 | AA+0.42s to AAA | 2026-04-26 | 2026 SI PS ABB Meet - B Group venue |
| 200 Backstroke | LCM | 2:36.80 | AAA+4.61s to AAAA | 2026-05-22 | 2026 Speedo Grand Challenge Time Trials venue |
| 50 Breaststroke | LCM | 44.84 | BB+2.85s to A | 2026-04-26 | 2026 SI PS ABB Meet - B Group venue |
| 50 Butterfly | LCM | 33.50 | AA+1.51s to AAA | 2026-06-21 | 2026 SI Splash and Dash fast pool |
| 200 Individual Medley | LCM | 2:43.65 | AA+4.86s to AAA | 2026-06-27 | 2026 SI MRA LC Distance Meet venue |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 12.
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 | 26.50 | flat | 200 Free Relay | 2026-03-29 | 2026 Southwest Age Group Regional |
| 50 Freestyle | SCY | 25.65 | flying | 200 Free Relay (leg 3) | 2025-12-21 | 2025 SI Winter Age Group Championships |
| 100 Freestyle | SCY | 56.97 | flat | 400 Free Relay | 2025-12-20 | 2025 SI Winter Age Group Championships |
| 100 Freestyle | SCY | 55.01 | flying | 400 Free Relay (leg 3) | 2026-03-30 | 2026 Southwest Age Group Regional |
| 50 Backstroke | SCY | 30.60 | flat | 200 Medley Relay | 2026-03-29 | 2026 Southwest Age Group Regional |
| 100 Backstroke | SCY | 1:04.53 | flat | 400 Medley Relay | 2026-03-28 | 2026 Southwest Age Group Regional |
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 11-12 · SCY
4045 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 500 FR SCY | 5:20.08 | 953 |
| 100 BK SCY | 1:02.03 | 882 |
| 100 BR SCY | 1:25.61 | 496 |
| 100 FL SCY | 1:03.86 | 792 |
| 200 IM SCY | 2:15.69 | 922 |
IMR 11-12 · LCM
3921 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 200 FR LCM | 2:12.93 | 1033 |
| 50 BK LCM | 34.41 | 849 |
| 50 BR LCM | 44.84 | 521 |
| 50 FL LCM | 33.50 | 739 |
| 200 IM LCM | 2:43.65 | 779 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
100 Freestyle SCY 56.03
Front half 26.82s · back half 29.21s
500 Freestyle SCY 5:20.08
Front half 157.37s · back half 162.71s
1000 Freestyle SCY 11:16.39
Front half 339.09s · back half 337.30s
1650 Freestyle SCY 18:51.34
200 Backstroke SCY 2:15.69
Front half 66.05s · back half 69.64s
200 Breaststroke SCY 3:05.94
Front half 89.66s · back half 96.28s
100 Freestyle LCM 1:03.20
Front half 29.91s · back half 33.29s
400 Freestyle LCM 4:52.60
Front half 143.44s · back half 149.16s
800 Freestyle LCM 9:53.81 · 33.0 min after 200 Backstroke
Front half 296.77s · back half 297.04s
1500 Freestyle LCM 18:54.01 · 17.6 min after 200 Individual Medley
100 Backstroke LCM 1:14.71
Front half 36.08s · back half 38.63s
200 Individual Medley LCM 2:43.65 · 1.1 min after 200 Individual Medley
Front half 75.17s · back half 88.48s
Progression
Faster times are higher. One card per event, all courses & history.