swimJack Mahaffey
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 21.03 | AAAA | 2026-03-07 | 2026 OH Tim Myers SC Senior Champs fast pool |
| 100 Freestyle | SCY | 47.63 | AAA+1.54s to AAAA | 2025-03-02 | 2025 OH Tim Myers Memorial SC Senior Champs venue |
| 200 Freestyle | SCY | 2:27.94 | +12.55s to B | 2019-12-07 | Shaker Shark Invitational venue |
| 50 Backstroke | SCY | 22.37 | AAAA | 2026-03-06 | 2026 OH Tim Myers SC Senior Champs fast pool |
| 100 Backstroke | SCY | 48.39 | AAAA | 2026-03-07 | 2026 OH Tim Myers SC Senior Champs fast pool |
| 200 Backstroke | SCY | 1:50.19 | AAA+0.60s to AAAA | 2026-03-06 | 2026 OH Tim Myers SC Senior Champs fast pool |
| 50 Breaststroke | SCY | 46.72 | +10.73s to B | 2018-12-01 | Shaker Shark Invitational venue |
| 50 Butterfly | SCY | 23.62 | AAA+0.23s to AAAA | 2025-11-23 | 2025 OH SC Senior Fall Invitational venue |
| 100 Butterfly | SCY | 57.90 | BB+1.21s to A | 2024-03-01 | 2024 OH Tim Myers Memorial SC Senior Champs venue |
| 200 Individual Medley | SCY | 2:30.08 | +0.49s to B | 2021-12-03 | Shaker Shark Invitational |
| 50 Freestyle | LCM | 26.65 | AA+1.16s to AAA | 2025-07-26 | 2025 OH LSC LC Senior Champs venue |
| 100 Freestyle | LCM | 1:00.79 | BB+0.20s to A | 2024-07-28 | 2024 OH LSC LC Senior Champs venue |
| 50 Backstroke | LCM | 26.83 | AAAA | 2025-08-01 | 2025 Jrs Time Trials fast pool |
| 100 Backstroke | LCM | 58.89 | AAAA | 2025-08-02 | 2025 Speedo Junior National Championships fast pool |
| 200 Backstroke | LCM | 2:23.04 | A+2.05s to AA | 2024-07-18 | 2024OH CZ East Speedo Sectionals fast pool |
| 50 Butterfly | LCM | 26.63 | AAA+0.24s to AAAA | 2025-08-02 | 2025 Speedo Junior National Championships fast pool |
| 100 Butterfly | LCM | 1:05.61 | BB+0.42s to A | 2024-07-26 | 2024 OH LSC LC Senior Champs venue |
| 200 Individual Medley | LCM | 2:32.39 | BB+3.80s to A | 2024-07-28 | 2024 OH LSC LC Senior Champs 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 Backstroke | SCY | 22.64 | flat | 200 Medley Relay | 2025-11-22 | 2025 OH SC Senior Fall Invitational |
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 · SCY
1338 points (2/6 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 200 BK SCY | 1:50.19 | 938 |
| 200 IM SCY | 2:30.08 | 400 |
| 500 FR SCY | — | 0 |
| 200 BR SCY | — | 0 |
| 200 FL SCY | — | 0 |
| 400 IM SCY | — | 0 |
IMR 17-18 · SCY
2350 points (4/5 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 200 FR SCY | 2:27.94 | 310 |
| 100 BK SCY | 48.39 | 1031 |
| 100 FL SCY | 57.90 | 609 |
| 200 IM SCY | 2:30.08 | 400 |
| 100 BR SCY | — | 0 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
100 Freestyle SCY 47.63
Front half 22.95s · back half 24.68s
200 Freestyle SCY 2:27.94
Front half 70.46s · back half 77.48s
100 Backstroke SCY 48.39
Front half 23.28s · back half 25.11s
200 Backstroke SCY 1:50.19
Front half 53.24s · back half 56.95s
100 Butterfly SCY 57.90
Front half 26.34s · back half 31.56s
100 Freestyle LCM 1:00.79
Front half 28.56s · back half 32.23s
100 Backstroke LCM 58.89 RT 0.76s
Front half 27.99s · back half 30.90s
200 Backstroke LCM 2:23.04
Front half 67.98s · back half 75.06s
100 Butterfly LCM 1:05.61
Front half 30.81s · back half 34.80s
200 Individual Medley LCM 2:32.39
Front half 67.11s · back half 85.28s
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.