swimJacob McCormack
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 21.49 | AAA+0.80s to AAAA | 2025-03-08 | 2025 SC Illinois Senior Championships venue |
| 100 Freestyle | SCY | 49.87 | AA+2.18s to AAA | 2024-07-14 | 2024 IL DLTA Summer Regional Championships slow pool |
| 50 Backstroke | SCY | 25.88 | A+0.49s to AA | 2025-03-07 | 2025 SC Illinois Senior Championships venue |
| 100 Backstroke | SCY | 55.25 | A+1.36s to AA | 2024-03-13 | 1466378 |
| 200 Backstroke | SCY | 2:10.58 | BB+6.79s to A | 2024-07-13 | 2024 IL DLTA Summer Regional Championships slow pool |
| 50 Breaststroke | SCY | 28.51 | AA+0.52s to AAA | 2025-07-20 | 2025 ISI Summer LWSA Regional venue |
| 50 Butterfly | SCY | 22.81 | AAAA | 2025-03-08 | 2025 SC Illinois Senior Championships venue |
| 100 Butterfly | SCY | 55.02 | A+1.13s to AA | 2025-03-07 | 2025 SC Illinois Senior Championships venue |
| 50 Freestyle | LCM | 25.61 | AA+0.52s to AAA | 2025-08-02 | 2025 LC Illinois Senior Championships venue |
| 50 Backstroke | LCM | 29.82 | AA+0.53s to AAA | 2025-08-01 | 2025 LC Illinois Senior Championships venue |
| 100 Backstroke | LCM | 1:04.11 | AA+2.72s to AAA | 2025-08-02 | 2025 LC Illinois Senior Championships venue |
| 50 Breaststroke | LCM | 33.23 | AA+1.04s to AAA | 2025-08-03 | 2025 LC Illinois Senior Championships venue |
| 50 Butterfly | LCM | 25.96 | AAAA | 2025-08-02 | 2025 LC Illinois Senior Championships venue |
| 100 Butterfly | LCM | 1:03.20 | A+1.61s to AA | 2025-08-01 | 2025 LC Illinois Senior Championships venue |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 18.
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 | 23.30 | flying | 200 Medley Relay (leg 4) | 2024-07-13 | 2024 IL DLTA Summer Regional Championships |
| 50 Freestyle | SCY | 22.22 | flying | 200 Free Relay (leg 4) | 2024-07-14 | 2024 IL DLTA Summer Regional Championships |
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
564 points (1/6 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 200 BK SCY | 2:10.58 | 564 |
| 500 FR SCY | — | 0 |
| 200 BR SCY | — | 0 |
| 200 FL SCY | — | 0 |
| 200 IM SCY | — | 0 |
| 400 IM SCY | — | 0 |
IMR 17-18 · LCM
1442 points (2/5 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 100 BK LCM | 1:04.11 | 747 |
| 100 FL LCM | 1:03.20 | 695 |
| 200 FR LCM | — | 0 |
| 100 BR LCM | — | 0 |
| 200 IM 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 49.87
Front half 23.81s · back half 26.06s
200 Backstroke SCY 2:10.58
Front half 60.40s · back half 70.18s
100 Butterfly SCY 55.02
Front half 25.17s · back half 29.85s
100 Backstroke LCM 1:04.11 RT 0.59s
Front half 30.78s · back half 33.33s
100 Butterfly LCM 1:03.20 RT 0.64s
Front half 27.90s · back half 35.30s
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.