swimWilliam Mulder
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 21.41 | AAA+0.32s to AAAA | 2026-02-14 | 2026 MR TYR Senior Mets Winter Championship venue |
| 100 Freestyle | SCY | 46.54 | AAA+0.45s to AAAA | 2026-03-06 | Speedo Southern Premier |
| 200 Freestyle | SCY | 1:44.93 | AAA+3.44s to AAAA | 2025-11-22 | 2025 MR LIAC Thanksgiving Invite venue |
| 100 Backstroke | SCY | 54.05 | AA+1.56s to AAA | 2025-11-01 | 2025 MR TRI Fall SCY Invitational venue |
| 50 Breaststroke | SCY | 26.39 | AAAA | 2025-10-25 | 2025 MR LIAC Chappy's Invitational venue |
| 100 Breaststroke | SCY | 57.47 | AAA+0.78s to AAAA | 2026-03-06 | Speedo Southern Premier fast pool |
| 200 Breaststroke | SCY | 2:18.27 | A+3.38s to AA | 2025-03-29 | 2025 EZ North Speedo Short Course Sectionals venue |
| 100 Butterfly | SCY | 53.59 | AA+1.60s to AAA | 2026-02-13 | 2026 MR TYR Senior Mets Winter Championship venue |
| 200 Individual Medley | SCY | 1:59.15 | AA+1.66s to AAA | 2024-07-17 | 2024 MR BGNW July Get Some Yards Times Invite venue |
| 50 Freestyle | LCM | 25.13 | AAA+0.74s to AAAA | 2026-04-26 | 2026 MR LIAC Speedo Long Island Challenge venue |
| 100 Freestyle | LCM | 54.76 | AAA+1.77s to AAAA | 2026-04-25 | 2026 MR LIAC Speedo Long Island Challenge venue |
| 200 Freestyle | LCM | 2:05.04 | AA+2.85s to AAA | 2024-06-22 | 2024 MR PAC Summer Classic Invitational venue |
| 400 Freestyle | LCM | 4:29.33 | AA+8.74s to AAA | 2023-05-19 | 2023 MR PAC Spring Starter Invitational venue |
| 1500 Freestyle | LCM | 18:28.58 | A+22.19s to AA | 2023-06-04 | 2023 MR SSC Summer Mad Dash Invitational venue |
| 100 Backstroke | LCM | 1:03.40 | AA+1.51s to AAA | 2026-04-25 | 2026 MR LIAC Speedo Long Island Challenge venue |
| 200 Backstroke | LCM | 2:17.86 | AA+3.07s to AAA | 2023-07-16 | 2023 MR Senior Mets LCM Championships venue |
| 50 Breaststroke | LCM | 30.33 | AAAA | 2025-07-26 | 2025 TYR FUTURES OCALA venue |
| 100 Breaststroke | LCM | 1:08.10 | AAA+2.01s to AAAA | 2025-07-23 | 2025 TYR FUTURES OCALA venue |
| 200 Breaststroke | LCM | 2:33.96 | AA+2.97s to AAA | 2023-07-16 | 2023 MR Senior Mets LCM Championships venue |
| 50 Butterfly | LCM | 27.65 | AAA+1.26s to AAAA | 2025-07-24 | 2025 TYR FUTURES OCALA venue |
| 100 Butterfly | LCM | 1:02.61 | A+0.22s to AA | 2024-06-08 | 2024 LIE June Jumpoff venue |
| 200 Butterfly | LCM | 2:29.58 | BB+4.19s to A | 2024-05-19 | 2024 MR PAC Spring Starter Invitational venue |
| 200 Individual Medley | LCM | 2:16.20 | AA+0.01s to AAA | 2024-07-13 | 2024 MR Senior Mets LC Summer Championship venue |
| 400 Individual Medley | LCM | 5:01.10 | AA+8.71s to AAA | 2024-05-17 | 2024 MR PAC Spring Starter Invitational 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 | LCM | 25.66 | flat | 200 Free Relay | 2024-07-12 | 2024 MR Senior Mets LC Summer Championship |
| 50 Freestyle | LCM | 25.42 | flying | 200 Free Relay (leg 2) | 2024-03-24 | 2024 Speedo Sectional Championship |
| 100 Freestyle | LCM | 57.02 | flat | 400 Free Relay | 2024-03-23 | 2024 Speedo Sectional Championship |
| 100 Freestyle | LCM | 57.02 | flying | 400 Medley Relay (leg 4) | 2024-03-24 | 2024 Speedo Sectional Championship |
| 100 Freestyle | LCM | 56.04 | flying | 400 Free Relay (leg 3) | 2024-07-14 | 2024 MR Senior Mets LC Summer Championship |
| 200 Freestyle | LCM | 2:05.84 | flying | 800 Free Relay (leg 3) | 2023-07-13 | 2023 MR Senior Mets LCM Championships |
| 50 Backstroke | LCM | 31.49 | flat | 200 Medley Relay | 2024-03-23 | 2024 Speedo Sectional Championship |
| 100 Backstroke | LCM | 1:04.01 | flat | 400 Medley Relay | 2024-07-13 | 2024 MR Senior Mets LC Summer Championship |
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
4515 points (6/6 events)
| Event | Time | Points |
|---|---|---|
| 400 FR LCM | 4:29.33 | 751 |
| 200 BK LCM | 2:17.86 | 779 |
| 200 BR LCM | 2:33.96 | 782 |
| 200 FL LCM | 2:29.58 | 587 |
| 200 IM LCM | 2:16.20 | 849 |
| 400 IM LCM | 5:01.10 | 767 |
IMR 17-18 · SCY
4101 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 200 FR SCY | 1:44.93 | 870 |
| 100 BK SCY | 54.05 | 740 |
| 100 BR SCY | 57.47 | 924 |
| 100 FL SCY | 53.59 | 768 |
| 200 IM SCY | 1:59.15 | 799 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
200 Freestyle SCY 1:44.93
100 Backstroke SCY 54.05
Front half 26.77s · back half 27.28s
200 Breaststroke SCY 2:18.27
Front half 62.92s · back half 75.35s
100 Butterfly SCY 53.59
Front half 24.98s · back half 28.61s
200 Individual Medley SCY 1:59.15
Front half 55.82s · back half 63.33s
100 Freestyle LCM 54.76
Front half 26.39s · back half 28.37s
200 Freestyle LCM 2:05.04
Front half 61.18s · back half 63.86s
400 Freestyle LCM 4:29.33
Front half 134.66s · back half 134.67s
1500 Freestyle LCM 18:28.58
100 Backstroke LCM 1:03.40
Front half 30.58s · back half 32.82s
200 Backstroke LCM 2:17.86
Front half 69.07s · back half 68.79s
100 Breaststroke LCM 1:08.10
Front half 32.05s · back half 36.05s
200 Breaststroke LCM 2:33.96
Front half 73.79s · back half 80.17s
200 Butterfly LCM 2:29.58
Front half 68.31s · back half 81.27s
200 Individual Medley LCM 2:16.20
Front half 65.42s · back half 70.78s
400 Individual Medley LCM 5:01.10
Front half 147.62s · back half 153.48s
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.