swimstats

Mackenzie O'Brien

Fage 15CZINMIMRSDMIMMAWILL

226 plausible swims · 36 meets · 2023-01-07 → 2026-07-29

Personal records

EventCourseBest CutDateMeet
50 Freestyle SCY 24.08 AAAA·Sectionals ✓+0.19s to Futures 2026-02-28 2026 JAWS "Last Chance" Meetvenue
100 Freestyle SCY 53.02 AAA+0.43s to AAAA·Sectionals ✓+1.13s to Futures 2026-02-08 2026 Grand Rapids Openvenue
200 Freestyle SCY 1:58.70 AAA+5.21s to AAAA·+0.81s to Sectionals 2026-02-07 2026 Grand Rapids Openvenue
500 Freestyle SCY 5:31.01 AA+10.32s to AAA·+16.02s to Sectionals 2026-02-08 2026 Grand Rapids Openvenue
1650 Freestyle SCY 20:07.22 A+40.03s to AA·+110.73s to Sectionals 2024-11-01 Greater Kalamazoo Arena Challengevenue
50 Backstroke SCY 27.37 AAA+0.38s to AAAA·+0.08s to Sectionals 2026-03-01 2026 JAWS "Last Chance" Meetvenue
100 Backstroke SCY 59.13 AAA+2.14s to AAAA·Sectionals ✓+2.04s to Futures 2026-02-08 2026 Grand Rapids Openvenue
200 Backstroke SCY 2:11.14 AA+1.65s to AAA·Sectionals ✓+6.95s to Futures 2026-03-01 2026 JAWS "Last Chance" Meetvenue
50 Breaststroke SCY 31.49 AAA+0.10s to AAAA·+0.80s to Sectionals 2026-03-01 2026 JAWS "Last Chance" Meetvenue
100 Breaststroke SCY 1:10.88 AA+2.19s to AAA·+1.39s to Sectionals 2026-02-07 2026 Grand Rapids Openvenue
200 Breaststroke SCY 2:35.54 A+0.95s to AA·+4.55s to Sectionals 2026-02-08 2026 Grand Rapids Openvenue
50 Butterfly SCY 25.98 AAAA·Sectionals ✓+0.29s to Futures 2026-02-28 2026 JAWS "Last Chance" Meetvenue
100 Butterfly SCY 58.43 AAA+1.64s to AAAA·Sectionals ✓+1.84s to Futures 2026-02-07 2026 Grand Rapids Openvenue
200 Butterfly SCY 2:17.22 AA+5.03s to AAA·+4.13s to Sectionals 2026-03-07 2026 Lake Superior Regional Meetvenue
100 Individual Medley SCY 59.25 2026-02-28 2026 JAWS "Last Chance" Meetvenue
200 Individual Medley SCY 2:12.68 AAA+5.99s to AAAA·Sectionals ✓+6.29s to Futures 2026-03-01 2026 JAWS "Last Chance" Meetvenue
400 Individual Medley SCY 4:53.79 AA+8.70s to AAA·+9.80s to Sectionals 2025-12-05 EGRA 2025 Winter Washoutvenue
50 Freestyle LCM 26.91 AAAA·Futures ✓+0.02s to Winter JNs 2026-07-25 2026 MI LCM ULTRA Championship Meetvenue
100 Freestyle LCM 59.66 AAAA·Sectionals ✓+0.37s to Futures 2026-07-24 2026 MI LCM ULTRA Championship Meetvenue
200 Freestyle LCM 2:17.05 AA+1.56s to AAA·+3.96s to Sectionals 2026-07-11 2026 West Michigan Classicvenue
400 Freestyle LCM 5:08.44 A+10.35s to AA·+26.05s to Sectionals 2025-06-14 2025 JAWS Sun & Funvenue
800 Freestyle LCM 10:43.63 BB+2.74s to A·+62.24s to Sectionals 2025-06-21 2025 Summer Solstice Meetvenue
1500 Freestyle LCM 20:24.01 A+47.72s to AA·+107.52s to Sectionals 2024-06-14 JAWS Sun & Funvenue
50 Backstroke LCM 30.54 AAAA·Futures ✓+0.75s to Jr Nationals 2026-07-24 2026 MI LCM ULTRA Championship Meetvenue
100 Backstroke LCM 1:06.51 AAA+0.22s to AAAA·Futures ✓+1.72s to Winter JNs 2026-07-26 2026 MI LCM ULTRA Championship Meetvenue
200 Backstroke LCM 2:43.40 BB+0.61s to A·+12.01s to Sectionals 2025-06-22 2025 Summer Solstice Meetvenue
50 Breaststroke LCM 37.00 AA+0.01s to AAA·+1.41s to Sectionals 2026-06-06 MLA Big Red Challengevenue
100 Breaststroke LCM 1:24.45 A+2.16s to AA·+4.46s to Sectionals 2026-06-07 MLA Big Red Challengevenue
200 Breaststroke LCM 3:17.55 BB+11.76s to A·+24.76s to Sectionals 2025-06-14 2025 JAWS Sun & Funvenue
50 Butterfly LCM 28.93 AAAA·Futures ✓+0.54s to Jr Nationals 2026-07-26 2026 MI LCM ULTRA Championship Meetvenue
100 Butterfly LCM 1:05.72 AAA+1.43s to AAAA·Sectionals ✓+1.03s to Futures 2026-03-27 2026 Central Zone East Spring Speedo Sectionavenue
200 Butterfly LCM 2:41.13 A+4.34s to AA·+9.14s to Sectionals 2026-07-12 2026 West Michigan Classicvenue
200 Individual Medley LCM 2:33.04 AA+0.25s to AAA·+1.75s to Sectionals 2026-07-12 2026 West Michigan Classicvenue
400 Individual Medley LCM 5:43.02 A+2.93s to AA·+18.63s to Sectionals 2025-06-13 2025 JAWS Sun & Funvenue

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.

Fastest relay legs

LegCourseTime StartRelayDateMeet
50 Freestyle SCY 24.68 flat 200 Free Relay 2025-12-06 EGRA 2025 Winter Washout
50 Freestyle SCY 23.73 flying 200 Free Relay (leg 4) 2025-10-18 2025 HS Girls MISCA Meet
100 Freestyle SCY 54.79 flat 400 Free Relay 2025-03-07 2025 SCY MAGS Championship Meet
100 Freestyle SCY 52.40 flying 400 Free Relay (leg 4) 2025-10-18 2025 HS Girls MISCA Meet
50 Backstroke SCY 29.85 flat 200 Medley Relay 2025-03-09 2025 SCY MAGS Championship Meet
100 Backstroke SCY 1:02.33 flat 400 Medley Relay 2025-03-22 2025 ULTRA Championship Meet
50 Butterfly SCY 25.93 flying 200 Medley Relay (leg 3) 2026-03-08 2026 Lake Superior Regional Meet
50 Freestyle LCM 27.33 flat 200 Free Relay 2026-07-26 2026 MI LCM ULTRA Championship Meet
50 Freestyle LCM 29.66 flying 200 Medley Relay (leg 4) 2024-07-28 2024 LCM ULTRA Championship Meet
50 Freestyle LCM 27.35 flying 200 Free Relay (leg 4) 2025-08-08 2025 Central Zone 14 & Under Championship Mee
100 Freestyle LCM 1:02.29 flat 400 Free Relay 2025-08-10 2025 Central Zone 14 & Under Championship Mee
100 Freestyle LCM 1:00.28 flying 400 Free Relay (leg 4) 2026-07-25 2026 MI LCM ULTRA Championship Meet
50 Butterfly LCM 28.70 flying 200 Medley Relay (leg 3) 2026-07-24 2026 MI LCM ULTRA Championship Meet
100 Butterfly LCM 1:06.94 flying 400 Medley Relay (leg 3) 2026-07-25 2026 MI LCM ULTRA Championship Meet

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

4586 points (6/6 events)

EventTime Points
500 FR SCY 5:31.01 750
200 BK SCY 2:11.14 799
200 BR SCY 2:35.54 721
200 FL SCY 2:17.22 744
200 IM SCY 2:12.68 828
400 IM SCY 4:53.79 744

IMR 15-16 · SCY

4139 points (5/5 events)

EventTime Points
200 FR SCY 1:58.70 835
100 BK SCY 59.13 853
100 BR SCY 1:10.88 753
100 FL SCY 58.43 870
200 IM SCY 2:12.68 828

Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.

PR splits

100 Freestyle SCY 53.02

25.54
27.48

Front half 25.54s · back half 27.48s

200 Freestyle SCY 1:58.70

27.97
29.90
30.25
30.58

Front half 57.87s · back half 60.83s

500 Freestyle SCY 5:31.01

28.81
32.27
32.87
33.58
33.52
34.13
34.08
34.33
34.27
33.15

Front half 161.05s · back half 169.96s

1650 Freestyle SCY 20:07.22

31.06
34.92
35.91
35.88
35.80
36.34
36.35
36.45
36.87
36.81
37.20
37.05
37.05
37.27
37.02
37.56
37.27
37.04
37.89
36.99
37.49
37.64
37.32
37.69
37.26
37.37
37.14
37.13
37.28
35.85
36.22
36.13
33.97

100 Backstroke SCY 59.13

28.65
30.48

Front half 28.65s · back half 30.48s

200 Backstroke SCY 2:11.14

30.18
32.40
34.30
34.26

Front half 62.58s · back half 68.56s

100 Breaststroke SCY 1:10.88

32.96
37.92

Front half 32.96s · back half 37.92s

200 Breaststroke SCY 2:35.54

34.89
40.02
40.48
40.15

Front half 74.91s · back half 80.63s

100 Butterfly SCY 58.43

27.20
31.23

Front half 27.20s · back half 31.23s

200 Butterfly SCY 2:17.22

28.32
33.96
36.59
38.35

Front half 62.28s · back half 74.94s

100 Individual Medley SCY 59.25

26.61
32.64

Front half 26.61s · back half 32.64s

200 Individual Medley SCY 2:12.68

27.63
32.31
40.65
32.09

Front half 59.94s · back half 72.74s

400 Individual Medley SCY 4:53.79

29.51
34.59
36.39
36.41
42.70
44.09
35.56
34.54

Front half 136.90s · back half 156.89s

100 Freestyle LCM 59.66

28.90
30.76

Front half 28.90s · back half 30.76s

200 Freestyle LCM 2:17.05

31.54
34.84
35.43
35.24

Front half 66.38s · back half 70.67s

400 Freestyle LCM 5:08.44

35.45
38.31
40.05
39.27
40.31
39.34
40.03
35.68

Front half 153.08s · back half 155.36s

800 Freestyle LCM 10:43.63

36.90
38.95
41.24
39.48
41.86
40.26
41.78
40.55
41.91
40.33
37.17
45.30
36.53
45.17
37.11
39.09

Front half 321.02s · back half 322.61s

1500 Freestyle LCM 20:24.01

36.35
38.91
42.13
40.85
41.95
40.97
41.73
40.86
38.92
44.33
41.34
40.57
42.46
41.46
38.96
43.83
42.47
40.64
42.37
40.37
41.94
40.52
41.58
40.27
41.36
40.51
39.53
38.87
39.89
38.07

Front half 611.79s · back half 612.22s

100 Backstroke LCM 1:06.51

32.07
34.44

Front half 32.07s · back half 34.44s

200 Backstroke LCM 2:43.40

38.23
42.86
41.05
41.26

Front half 81.09s · back half 82.31s

100 Breaststroke LCM 1:24.45

39.26
45.19

Front half 39.26s · back half 45.19s

200 Breaststroke LCM 3:17.55

45.33
50.01
52.86
49.35

Front half 95.34s · back half 102.21s

100 Butterfly LCM 1:05.72

30.10
35.62

Front half 30.10s · back half 35.62s

200 Butterfly LCM 2:41.13

34.60
40.42
43.02
43.09

Front half 75.02s · back half 86.11s

200 Individual Medley LCM 2:33.04

32.51
37.87
46.90
35.76

Front half 70.38s · back half 82.66s

400 Individual Medley LCM 5:43.02

35.23
41.39
44.70
42.95
51.10
50.07
40.47
37.11

Front half 164.27s · back half 178.75s

Reaction time

fastest 0.64s average 0.645s slowest 0.65s 2 electronic starts

Start reaction over time faster starts higher

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
DateEventCourse TimeAge RoundMeet

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.

50 Freestyle SCY 24.08 7 swims
100 Freestyle SCY 53.02 6 swims
200 Freestyle SCY 1:58.70 6 swims
500 Freestyle SCY 5:31.01 3 swims
1650 Freestyle SCY 20:07.22 2 swims
50 Backstroke SCY 27.37 4 swims
100 Backstroke SCY 59.13 3 swims
200 Backstroke SCY 2:11.14 4 swims
50 Breaststroke SCY 31.49 2 swims
100 Breaststroke SCY 1:10.88 4 swims
200 Breaststroke SCY 2:35.54 3 swims
50 Butterfly SCY 25.98 6 swims
100 Butterfly SCY 58.43 4 swims
200 Butterfly SCY 2:17.22 3 swims
100 Individual Medley SCY 59.25 6 swims
200 Individual Medley SCY 2:12.68 6 swims
400 Individual Medley SCY 4:53.79 2 swims
50 Freestyle LCM 26.91 25 swims
100 Freestyle LCM 59.66 14 swims
200 Freestyle LCM 2:17.05 6 swims
400 Freestyle LCM 5:08.44 3 swims
800 Freestyle LCM 10:43.63 2 swims
1500 Freestyle LCM 20:24.01 1 swim
50 Backstroke LCM 30.54 14 swims
100 Backstroke LCM 1:06.51 17 swims
200 Backstroke LCM 2:43.40 4 swims
50 Breaststroke LCM 37.00 6 swims
100 Breaststroke LCM 1:24.45 6 swims
200 Breaststroke LCM 3:17.55 2 swims
50 Butterfly LCM 28.93 19 swims
100 Butterfly LCM 1:05.72 18 swims
200 Butterfly LCM 2:41.13 2 swims
200 Individual Medley LCM 2:33.04 10 swims
400 Individual Medley LCM 5:43.02 2 swims