Declan Costello
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 23.08 | AA+0.39s to AAA·+0.69s to Sectionals | 2026-03-26 | ISCA INTERNATIONAL SENIOR CUPvenue |
| 100 Freestyle | SCY | 49.64 | AAA+2.15s to AAAA·+1.15s to Sectionals | 2026-03-28 | ISCA INTERNATIONAL SENIOR CUPvenue |
| 200 Freestyle | SCY | 1:46.91 | AAA+3.12s to AAAA·+0.62s to Sectionals | 2026-03-06 | 2026 PV Short Course Open Championshipsvenue |
| 500 Freestyle | SCY | 4:47.03 | AAA+4.74s to AAAA·Sectionals ✓+9.94s to Futures | 2025-12-11 | 2025 Riley Eaton Holiday Invitational |
| 1000 Freestyle | SCY | 10:00.60 | AAA+12.81s to AAAA·+1.11s to Sectionals | 2026-03-05 | 2026 PV Short Course Open Championshipsvenue |
| 1650 Freestyle | SCY | 16:41.26 | AAA+20.47s to AAAA·Sectionals ✓+35.77s to Futures | 2025-12-11 | 2025 Riley Eaton Holiday Invitational |
| 100 Backstroke | SCY | 1:00.78 | BB+1.19s to A·+6.29s to Sectionals | 2025-10-11 | 2025 PV October Open - Fairlandvenue |
| 200 Backstroke | SCY | 2:08.45 | A+3.76s to AA·+9.86s to Sectionals | 2025-11-02 | NOVA Senior Classicvenue |
| 50 Breaststroke | SCY | 29.39 | AAA+1.30s to AAAA·+3.10s to Futures | 2026-03-26 | ISCA INTERNATIONAL SENIOR CUPvenue |
| 100 Breaststroke | SCY | 1:04.66 | A+0.07s to AA·+3.17s to Sectionals | 2026-03-27 | ISCA INTERNATIONAL SENIOR CUPvenue |
| 200 Breaststroke | SCY | 2:24.15 | A+3.26s to AA·+9.16s to Sectionals | 2025-11-16 | 2025 PV November Open - Franconiavenue |
| 100 Butterfly | SCY | 1:01.52 | BB+2.63s to A·+8.33s to Sectionals | 2025-10-11 | 2025 PV October Open - Fairlandvenue |
| 200 Butterfly | SCY | 2:38.66 | +4.67s to B·+37.47s to Sectionals | 2024-01-27 | 2024 USAS IMX Gamesvenue |
| 200 Individual Medley | SCY | 2:03.33 | AA+2.14s to AAA·+3.94s to Sectionals | 2026-03-08 | 2026 PV Short Course Open Championshipsvenue |
| 400 Individual Medley | SCY | 4:23.47 | AA+2.98s to AAA·+8.38s to Sectionals | 2026-03-06 | 2026 PV Short Course Open Championshipsvenue |
| 50 Freestyle | LCM | 26.53 | AA+0.34s to AAA·+1.04s to Sectionals | 2026-05-16 | 2026 EZ LC Speedo Super Sectionalsvenue |
| 100 Freestyle | LCM | 58.03 | AA+0.94s to AAA·+2.54s to Sectionals | 2026-05-30 | Maryland State LC Championshipvenue |
| 200 Freestyle | LCM | 2:02.96 | AAA+2.97s to AAAA·+1.67s to Sectionals | 2026-05-15 | 2026 EZ LC Speedo Super Sectionalsvenue |
| 400 Freestyle | LCM | 4:16.03 | AAA+0.44s to AAAA·Sectionals ✓+6.04s to Futures | 2026-05-16 | 2026 EZ LC Speedo Super Sectionalsvenue |
| 800 Freestyle | LCM | 8:51.97 | AAA+3.48s to AAAA·Sectionals ✓+11.28s to Futures | 2026-07-09 | 2026 PV LC Open Championshipsvenue |
| 1500 Freestyle | LCM | 16:59.40 | AAA+0.21s to AAAA·Sectionals ✓+20.41s to Futures | 2026-05-14 | 2026 EZ LC Speedo Super Sectionalsvenue |
| 200 Backstroke | LCM | 2:38.45 | BB+7.36s to A·+23.66s to Sectionals | 2024-05-18 | HNVR Storm Surge 2024venue |
| 50 Breaststroke | LCM | 33.49 | AAA+1.50s to AAAA·+2.60s to Futures | 2026-05-15 | 2026 EZ LC Speedo Super Sectionalsvenue |
| 100 Breaststroke | LCM | 1:16.95 | A+1.86s to AA·+7.26s to Sectionals | 2026-05-31 | Maryland State LC Championshipvenue |
| 200 Individual Medley | LCM | 2:18.96 | AAA+4.87s to AAAA·+2.77s to Sectionals | 2026-05-02 | Early Bird LCvenue |
| 400 Individual Medley | LCM | 5:03.15 | AA+1.26s to AAA·+13.26s to Sectionals | 2026-07-10 | 2026 PV LC Open Championshipsvenue |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 15.
National cuts (Sectionals → Nationals) are the current-season meet qualifying times for the swimmer's zone and age group; ✓ marks the hardest cut already achieved.
Fastest relay legs
| Leg | Course | Time | Start | Relay | Date | Meet |
|---|---|---|---|---|---|---|
| 100 Freestyle | SCY | 50.15 | flying | 400 Free Relay (leg 4) | 2026-03-24 | ISCA INTERNATIONAL SENIOR CUP |
| 50 Freestyle | LCM | 26.51 | flying | 200 Free Relay (leg 4) | 2026-05-14 | 2026 EZ LC Speedo Super Sectionals |
| 200 Freestyle | LCM | 2:06.74 | flying | 800 Free Relay (leg 2) | 2026-05-16 | 2026 EZ LC Speedo Super Sectionals |
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 15-16 · SCY
4087 points (6/6 events)
| Event | Time | Points |
|---|---|---|
| 500 FR SCY | 4:47.03 | 891 |
| 200 BK SCY | 2:08.45 | 639 |
| 200 BR SCY | 2:24.15 | 656 |
| 200 FL SCY | 2:38.66 | 358 |
| 200 IM SCY | 2:03.33 | 773 |
| 400 IM SCY | 4:23.47 | 770 |
IMR 15-16 · SCY
3480 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 200 FR SCY | 1:46.91 | 868 |
| 100 BK SCY | 1:00.78 | 580 |
| 100 BR SCY | 1:04.66 | 710 |
| 100 FL SCY | 1:01.52 | 549 |
| 200 IM SCY | 2:03.33 | 773 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
100 Freestyle SCY 49.64
Front half 24.12s · back half 25.52s
200 Freestyle SCY 1:46.91
Front half 52.15s · back half 54.76s
500 Freestyle SCY 4:47.03 split/total mismatch
1000 Freestyle SCY 10:00.60
Front half 298.01s · back half 302.59s
1650 Freestyle SCY 16:41.26 split/total mismatch
100 Backstroke SCY 1:00.78
Front half 29.55s · back half 31.23s
200 Backstroke SCY 2:08.45
Front half 61.75s · back half 66.70s
100 Breaststroke SCY 1:04.66
Front half 29.72s · back half 34.94s
200 Breaststroke SCY 2:24.15
Front half 67.65s · back half 76.50s
100 Butterfly SCY 1:01.52
Front half 27.89s · back half 33.63s
200 Butterfly SCY 2:38.66
Front half 73.44s · back half 85.22s
200 Individual Medley SCY 2:03.33
Front half 59.57s · back half 63.76s
400 Individual Medley SCY 4:23.47
Front half 129.41s · back half 134.06s
100 Freestyle LCM 58.03
Front half 28.42s · back half 29.61s
200 Freestyle LCM 2:02.96
Front half 59.97s · back half 62.99s
400 Freestyle LCM 4:16.03
Front half 126.86s · back half 129.17s
800 Freestyle LCM 8:51.97
Front half 258.50s · back half 273.47s
1500 Freestyle LCM 16:59.40
200 Backstroke LCM 2:38.45
Front half 78.07s · back half 80.38s
100 Breaststroke LCM 1:16.95
Front half 35.75s · back half 41.20s
200 Individual Medley LCM 2:18.96
Front half 67.41s · back half 71.55s
400 Individual Medley LCM 5:03.15
Front half 151.10s · back half 152.05s
Swim history
Every recorded swim, newest first
| Date | Event | Course | Time | Age | Round | Meet |
|---|
Individual swims with a recorded date and time — including disqualifications — plus reconstructed relay legs (marked). Assembled in the browser from this page’s data.
Progression
Faster times are higher. One card per event, all courses & history.