swimJack Mahaffey
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 21.03 | AAAA·Futures ✓+0.54s to Winter JNs | 2026-03-07 | 2026 OH Tim Myers SC Senior Champsvenue |
| 100 Freestyle | SCY | 47.63 | AAA+1.54s to AAAA·Sectionals ✓+1.24s to Futures | 2025-03-02 | 2025 OH Tim Myers Memorial SC Senior Champsvenue |
| 200 Freestyle | SCY | 2:27.94 | +12.55s to B·+40.45s to Sectionals | 2019-12-07 | Shaker Shark Invitationalvenue |
| 50 Backstroke | SCY | 22.37 | AAAA·Nationals ✓+0.88s to US Open | 2026-03-06 | 2026 OH Tim Myers SC Senior Champsvenue |
| 100 Backstroke | SCY | 48.39 | AAAA·Jr Nationals ✓+0.50s to Nationals | 2026-03-07 | 2026 OH Tim Myers SC Senior Champsvenue |
| 200 Backstroke | SCY | 1:50.19 | AAA+0.60s to AAAA·Futures ✓+2.40s to Winter JNs | 2026-03-06 | 2026 OH Tim Myers SC Senior Champsvenue |
| 50 Breaststroke | SCY | 46.72 | +10.73s to B·+19.53s to Sectionals | 2018-12-01 | Shaker Shark Invitationalvenue |
| 50 Butterfly | SCY | 23.62 | AAA+0.23s to AAAA·Sectionals ✓+0.73s to Futures | 2025-11-23 | 2025 OH SC Senior Fall Invitationalvenue |
| 100 Butterfly | SCY | 57.90 | BB+1.21s to A·+3.91s to Sectionals | 2024-03-01 | 2024 OH Tim Myers Memorial SC Senior Champsvenue |
| 200 Individual Medley | SCY | 2:30.08 | +0.49s to B·+29.09s to Sectionals | 2021-12-04 | Shaker Shark Invitationalvenue |
| 50 Freestyle | LCM | 24.46 | AAA+0.07s to AAAA·Futures ✓+0.37s to Winter JNs | 2026-01-01 | 2026 Speedo Junior National Championships |
| 100 Freestyle | LCM | 1:00.79 | BB+0.20s to A·+4.20s to Sectionals | 2024-07-28 | 2024 OH LSC LC Senior Champsvenue |
| 50 Backstroke | LCM | 26.10 | AAAA·Nationals ✓+0.01s to US Open | 2026-07-17 | 2026 Central Zone East Summer Speedo Sectionafast pool |
| 100 Backstroke | LCM | 56.93 | AAAA·Jr Nationals ✓+0.04s to Nationals | 2026-07-18 | 2026 Central Zone East Summer Speedo Sectionafast pool |
| 200 Backstroke | LCM | 2:08.54 | AAAA·Futures ✓+0.25s to Winter JNs | 2026-07-16 | 2026 Central Zone East Summer Speedo Sectionafast pool |
| 50 Butterfly | LCM | 26.49 | AAA+0.10s to AAAA·Sectionals ✓+0.20s to Futures | 2026-07-16 | 2026 Central Zone East Summer Speedo Sectionafast pool |
| 100 Butterfly | LCM | 58.16 | AAA+1.17s to AAAA·Sectionals ✓+0.17s to Futures | 2026-07-17 | 2026 Central Zone East Summer Speedo Sectionafast pool |
| 200 Individual Medley | LCM | 2:32.39 | BB+3.80s to A·+13.00s to Sectionals | 2024-07-28 | 2024 OH LSC LC Senior Champsvenue |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 17.
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.
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 | 20.83 | flat | 200 Free Relay | 2026-03-05 | 2026 OH Tim Myers SC Senior Champs |
| 50 Freestyle | SCY | 20.23 | flying | 200 Free Relay (leg 3) | 2018-12-02 | Shaker Shark Invitational |
| 50 Backstroke | SCY | 22.50 | flat | 200 Medley Relay | 2026-03-08 | 2026 OH Tim Myers SC Senior Champs |
| 100 Backstroke | SCY | 48.14 | flat | 400 Medley Relay | 2026-03-06 | 2026 OH Tim Myers SC Senior Champs |
| 50 Freestyle | LCM | 23.72 | flying | 200 Free Relay (leg 3) | 2026-08-03 | 2026 Speedo Junior National Championships |
| 50 Backstroke | LCM | 26.18 | flat | 200 Medley Relay | 2026-08-05 | 2026 Speedo Junior National Championships |
| 100 Backstroke | LCM | 56.79 | flat | 400 Medley Relay | 2026-07-19 | 2026 Central Zone East Summer Speedo Sectiona |
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
1567 points (2/6 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 200 BK LCM | 2:08.54 | 961 |
| 200 IM LCM | 2:32.39 | 606 |
| 400 FR LCM | — | 0 |
| 200 BR LCM | — | 0 |
| 200 FL LCM | — | 0 |
| 400 IM LCM | — | 0 |
IMR 17-18 · LCM
2565 points (3/5 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 100 BK LCM | 56.93 | 1067 |
| 100 FL LCM | 58.16 | 892 |
| 200 IM LCM | 2:32.39 | 606 |
| 200 FR LCM | — | 0 |
| 100 BR LCM | — | 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
200 Individual Medley SCY 2:30.08
Front half 67.24s · back half 82.84s
100 Freestyle LCM 1:00.79
Front half 28.56s · back half 32.23s
100 Backstroke LCM 56.93
Front half 27.28s · back half 29.65s
200 Backstroke LCM 2:08.54
Front half 61.92s · back half 66.62s
100 Butterfly LCM 58.16
Front half 26.53s · back half 31.63s
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.
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.