swimLiam Cosio
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 23.40 | AA+0.71s to AAA·+0.21s to Sectionals | 2026-03-13 | 2026 SCS Spring Age Group Champs @ RMDA - copvenue |
| 100 Freestyle | SCY | 51.45 | AA+1.66s to AAA·+0.46s to Sectionals | 2026-02-22 | BUEN February Coastal Champsvenue |
| 200 Freestyle | SCY | 1:55.91 | A+2.32s to AA·+4.12s to Sectionals | 2026-03-14 | 2026 SCS Spring Age Group Champs @ RMDA - copvenue |
| 100 Backstroke | SCY | 1:01.35 | BB+1.76s to A·+5.86s to Sectionals | 2026-02-01 | 2026 CA AGAC Winterfest Classicvenue |
| 100 Breaststroke | SCY | 1:10.03 | BB+2.64s to A·+6.84s to Sectionals | 2026-01-31 | 2026 CA AGAC Winterfest Classicvenue |
| 50 Butterfly | SCY | 25.96 | AA+0.57s to AAA·+3.07s to Futures | 2026-02-22 | BUEN February Coastal Champsvenue |
| 100 Butterfly | SCY | 57.20 | A+0.81s to AA·+2.01s to Sectionals | 2026-03-14 | 2026 SCS Spring Age Group Champs @ RMDA - copvenue |
| 200 Butterfly | SCY | 2:22.54 | BB+10.55s to A·+19.15s to Sectionals | 2025-12-06 | 2025 CA LTA Toys for Tots Meetvenue |
| 100 Individual Medley | SCY | 1:02.50 | 2026-01-10 | SMSC 2026 Triple Slam!venue | |
| 200 Individual Medley | SCY | 2:08.09 | A+1.40s to AA·+4.10s to Sectionals | 2026-05-06 | 2026 CIF CENTRAL SECTION D1 CHAMPIONSHIPS |
| 50 Freestyle | LCM | 26.70 | AA+0.51s to AAA·Sectionals ✓+2.11s to Futures | 2026-06-14 | 2026 SCS June AG Invitevenue |
| 100 Freestyle | LCM | 57.94 | AA+0.85s to AAA·Sectionals ✓+4.35s to Futures | 2026-06-12 | 2026 SCS June AG Invitevenue |
| 200 Freestyle | LCM | 2:15.02 | A+3.53s to AA·+6.33s to Sectionals | 2026-05-30 | 2026 AGAC Spring Into Summer LCMfast pool |
| 50 Backstroke | LCM | 30.40 | AA+0.01s to AAA·+2.51s to Futures | 2026-04-18 | 2026 SLOS Spring Quadrathlon Challengevenue |
| 100 Backstroke | LCM | 1:11.92 | BB+2.33s to A·+6.73s to Sectionals | 2026-07-12 | 2026 SMSC Last Chance Arena Invitevenue |
| 50 Breaststroke | LCM | 36.82 | BB+0.33s to A·+5.93s to Futures | 2026-05-23 | BUEN Memorial Day LC Meetvenue |
| 100 Breaststroke | LCM | 1:24.67 | BB+6.28s to A·+10.97s to Sectionals | 2026-06-20 | 2026 SLOS Firecracker Invitationalvenue |
| 50 Butterfly | LCM | 29.54 | AA+0.85s to AAA·+3.25s to Futures | 2026-06-13 | 2026 SCS June AG Invitevenue |
| 100 Butterfly | LCM | 1:07.57 | BB+0.28s to A·+4.48s to Sectionals | 2025-07-18 | Renee and Jim Patterson Meet 2025venue |
| 200 Individual Medley | LCM | 2:31.24 | A+4.35s to AA·+6.55s to Sectionals | 2026-04-11 | 2026 BUEN LCM Openervenue |
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.
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 |
|---|---|---|---|---|---|---|
| 100 Freestyle | SCY | 53.78 | flying | 400 Free Relay (leg 4) | 2025-02-15 | 2025 CCS SCY AGC |
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
1184 points (2/6 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 200 FL SCY | 2:22.54 | 494 |
| 200 IM SCY | 2:08.09 | 690 |
| 500 FR SCY | — | 0 |
| 200 BK SCY | — | 0 |
| 200 BR SCY | — | 0 |
| 400 IM SCY | — | 0 |
IMR 15-16 · SCY
3177 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 200 FR SCY | 1:55.91 | 681 |
| 100 BK SCY | 1:01.35 | 564 |
| 100 BR SCY | 1:10.03 | 559 |
| 100 FL SCY | 57.20 | 683 |
| 200 IM SCY | 2:08.09 | 690 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
100 Freestyle SCY 51.45
Front half 25.09s · back half 26.36s
200 Freestyle SCY 1:55.91
Front half 55.57s · back half 60.34s
100 Backstroke SCY 1:01.35
Front half 29.81s · back half 31.54s
100 Breaststroke SCY 1:10.03
Front half 32.88s · back half 37.15s
100 Butterfly SCY 57.20
Front half 26.40s · back half 30.80s
200 Butterfly SCY 2:22.54
Front half 64.26s · back half 78.28s
100 Freestyle LCM 57.94
Front half 28.36s · back half 29.58s
200 Freestyle LCM 2:15.02
Front half 67.44s · back half 67.58s
100 Breaststroke LCM 1:24.67
Front half 40.41s · back half 44.26s
100 Butterfly LCM 1:07.57
200 Individual Medley LCM 2:31.24
Front half 71.65s · back half 79.59s
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.