swimstats

Makenzie O'Brien

Fage 18MDWVASCESTNDPUN

263 plausible swims · 53 meets · 2016-09-30 → 2025-08-01

Personal records

EventCourseBest CutDateMeet
50 Freestyle SCY 26.96 A+1.07s to AA·+2.17s to Sectionals 2022-12-10 2022 ASC Holiday Invitationalvenue
100 Freestyle SCY 59.62 BB+1.03s to A·+6.53s to Sectionals 2024-10-06 2024 ASC All Freestyle Meetvenue
200 Freestyle SCY 2:03.39 A+1.30s to AA·+8.40s to Sectionals 2022-12-10 2022 ASC Holiday Invitationalvenue
500 Freestyle SCY 5:26.73 AA+13.84s to AAA·+17.94s to Sectionals 2023-02-04 2023 ASC Senior Meetvenue
1000 Freestyle SCY 12:10.98 BB+15.79s to A·+91.99s to Sectionals 2021-01-08 MDSI Virtual Meet Series 20-21/023 EST Week 9slow pool
1650 Freestyle SCY 19:32.53 A+42.74s to AA·+103.14s to Sectionals 2024-12-28 2024 ASC IMX Challengevenue
50 Backstroke SCY 40.29 +5.40s to B·+14.00s to Futures 2017-01-22 2017 CBAC Winter Wake-Up Meetvenue
100 Backstroke SCY 1:04.62 BB+0.83s to A·+5.33s to Sectionals 2025-02-20 2025 Speedo MD LSC Senior Champs
200 Backstroke SCY 2:12.30 AA+5.21s to AAA·+3.41s to Sectionals 2024-02-25 2024 MD LSC Senior Champsvenue
50 Breaststroke SCY 35.03 BB+0.04s to A·+5.24s to Futures 2021-11-20 2021 NBAC Thanksgiving Meetvenue
100 Breaststroke SCY 1:10.30 A+0.31s to AA·+2.11s to Sectionals 2023-02-24 2023 MD LSC SR SCY Championhipsvenue
200 Breaststroke SCY 2:29.41 AA+4.12s to AAA·+0.02s to Sectionals 2023-02-04 2023 ASC Senior Meetvenue
50 Butterfly SCY 40.82 +5.93s to B·+15.13s to Futures 2017-01-22 2017 CBAC Winter Wake-Up Meetvenue
100 Butterfly SCY 1:04.22 BB+0.93s to A·+5.73s to Sectionals 2023-02-04 2023 ASC Senior Meetvenue
200 Butterfly SCY 2:33.06 B+1.17s to BB·+20.97s to Sectionals 2021-11-06 2021 FOX Fall Inviational Meet 2venue
100 Individual Medley SCY 1:06.09 2021-11-21 2021 NBAC Thanksgiving Meetvenue
200 Individual Medley SCY 2:15.08 AA+4.59s to AAA·+4.39s to Sectionals 2023-01-15 National Catholic H.S. Championship 2023venue
400 Individual Medley SCY 4:45.51 AA+7.42s to AAA·+7.12s to Sectionals 2023-02-24 2023 MD LSC SR SCY Championhipsvenue
50 Freestyle LCM 31.18 BB+0.19s to A·+2.89s to Sectionals 2024-04-27 2024 ASC Spring Long Course Meet
100 Freestyle LCM 1:06.57 A+2.38s to AA·+5.88s to Sectionals 2022-07-10 2022 Sandbox Invitationalvenue
200 Freestyle LCM 2:21.81 A+2.72s to AA·+10.92s to Sectionals 2024-05-18 2024 NBAC Spring LC Invitational Meetvenue
400 Freestyle LCM 4:52.50 AA+11.91s to AAA·+14.81s to Sectionals 2023-07-08 2023 Sandbox Invitationalvenue
800 Freestyle LCM 9:59.18 AA+17.59s to AAA·+29.19s to Sectionals 2023-07-06 2023 Sandbox Invitationalvenue
50 Backstroke LCM 34.70 A+0.41s to AA·+3.81s to Futures 2022-05-20 2022 NBAC Spring Long Course Meetvenue
100 Backstroke LCM 1:15.00 BB+0.81s to A·+7.11s to Sectionals 2024-05-19 2024 NBAC Spring LC Invitational Meetvenue
200 Backstroke LCM 2:34.91 A+0.42s to AA·+8.72s to Sectionals 2024-05-18 2024 NBAC Spring LC Invitational Meetvenue
50 Breaststroke LCM 38.49 A+0.50s to AA·+3.70s to Futures 2023-08-05 2023 Speedo Maryland Long Course Championshipvenue
100 Breaststroke LCM 1:22.02 A+1.23s to AA·+4.13s to Sectionals 2023-08-02 2023 Speedo Maryland Long Course Championshipvenue
200 Breaststroke LCM 2:52.98 AA+4.19s to AAA·+3.59s to Sectionals 2023-08-04 2023 Speedo Maryland Long Course Championshipvenue
50 Butterfly LCM 33.45 BB+0.26s to A·+3.96s to Futures 2025-07-31 2025 MD LSC LC Championshipsvenue
100 Butterfly LCM 1:15.81 BB+3.62s to A·+9.52s to Sectionals 2021-06-13 2021 FOX June Long Course Invitationalvenue
200 Butterfly LCM 2:59.57 B+6.58s to BB·+30.48s to Sectionals 2022-05-14 2022 NAAC BB & SLOWER MAY LCM MEETvenue
200 Individual Medley LCM 2:36.27 A+0.08s to AA·+7.88s to Sectionals 2023-07-08 2023 Sandbox Invitationalvenue
400 Individual Medley LCM 5:31.42 AA+12.13s to AAA·+10.93s to Sectionals 2023-08-03 2023 Speedo Maryland Long Course Championshipvenue

Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 18.

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

LegCourseTime StartRelayDateMeet
50 Freestyle SCY 32.03 flying 200 Free Relay (leg 3) 2016-11-19 GBSA - 2016 Thanksgiving Swim Fest
50 Breaststroke SCY 32.37 flying 200 Medley Relay (leg 2) 2023-02-23 2023 MD LSC SR SCY Championhips
100 Breaststroke SCY 1:11.03 flying 400 Medley Relay (leg 2) 2024-02-23 2024 MD LSC Senior Champs
100 Breaststroke LCM 1:21.03 flying 400 Medley Relay (leg 2) 2023-08-04 2023 Speedo Maryland Long Course Championship

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

4316 points (6/6 events)

EventTime Points
500 FR SCY 5:26.73 754
200 BK SCY 2:12.30 729
200 BR SCY 2:29.41 796
200 FL SCY 2:33.06 507
200 IM SCY 2:15.08 749
400 IM SCY 4:45.51 781

IMR 17-18 · SCY

3455 points (5/5 events)

EventTime Points
200 FR SCY 2:03.39 716
100 BK SCY 1:04.62 616
100 BR SCY 1:10.30 740
100 FL SCY 1:04.22 634
200 IM SCY 2:15.08 749

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

PR splits

100 Freestyle SCY 59.62

28.91
30.71

Front half 28.91s · back half 30.71s

200 Freestyle SCY 2:03.39

28.75
31.51
31.77
31.36

Front half 60.26s · back half 63.13s

500 Freestyle SCY 5:26.73

30.25
33.48
33.25
32.70
33.04
32.95
32.95
32.94
33.10
32.07

Front half 162.72s · back half 164.01s

1650 Freestyle SCY 19:32.53

30.64
33.91
34.26
34.84
34.56
35.13
35.13
35.29
34.85
35.48
35.57
35.36
35.71
35.74
35.58
35.76
35.09
35.44
36.07
36.00
35.97
36.08
37.23
36.16
36.69
36.28
36.64
36.64
36.39
36.86
36.91
36.07
34.20

200 Backstroke SCY 2:12.30

31.41
33.39
34.29
33.21

Front half 64.80s · back half 67.50s

100 Breaststroke SCY 1:10.30

33.21
37.09

Front half 33.21s · back half 37.09s

200 Breaststroke SCY 2:29.41

34.15
37.62
38.70
38.94

Front half 71.77s · back half 77.64s

100 Butterfly SCY 1:04.22

30.25
33.97

Front half 30.25s · back half 33.97s

200 Butterfly SCY 2:33.06

34.11
40.73
41.18
37.04

Front half 74.84s · back half 78.22s

100 Individual Medley SCY 1:06.09

30.06
36.03

Front half 30.06s · back half 36.03s

200 Individual Medley SCY 2:15.08

29.91
33.94
39.23
32.00

Front half 63.85s · back half 71.23s

400 Individual Medley SCY 4:45.51

30.95
36.30
37.61
35.41
39.15
39.66
34.41
32.02

Front half 140.27s · back half 145.24s

100 Freestyle LCM 1:06.57

31.86
34.71

Front half 31.86s · back half 34.71s

200 Freestyle LCM 2:21.81

32.81
36.90
36.52
35.58

Front half 69.71s · back half 72.10s

400 Freestyle LCM 4:52.50

33.85
36.79
37.43
37.10
37.01
37.07
36.89
36.36

Front half 145.17s · back half 147.33s

800 Freestyle LCM 9:59.18

33.40
37.13
37.55
37.99
37.15
38.58
37.09
38.52
37.37
38.50
38.23
38.57
37.41
38.43
36.99
36.27

Front half 297.41s · back half 301.77s

100 Backstroke LCM 1:15.00

36.30
38.70

Front half 36.30s · back half 38.70s

200 Backstroke LCM 2:34.91

37.23
39.11
39.55
39.02

Front half 76.34s · back half 78.57s

100 Breaststroke LCM 1:22.02

38.70
43.32

Front half 38.70s · back half 43.32s

200 Breaststroke LCM 2:52.98

39.34
44.05
44.36
45.23

Front half 83.39s · back half 89.59s

100 Butterfly LCM 1:15.81

34.71
41.10

Front half 34.71s · back half 41.10s

200 Butterfly LCM 2:59.57

38.81
46.68
47.55
46.53

Front half 85.49s · back half 94.08s

200 Individual Medley LCM 2:36.27

34.65
40.93
44.41
36.28

Front half 75.58s · back half 80.69s

400 Individual Medley LCM 5:31.42

36.30
42.83
44.16
41.57
45.06
46.18
38.60
36.72

Front half 164.86s · back half 166.56s

Reaction time

fastest 0.70s average 0.700s slowest 0.70s 1 electronic start

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 26.96 16 swims
100 Freestyle SCY 59.62 7 swims
200 Freestyle SCY 2:03.39 11 swims
500 Freestyle SCY 5:26.73 8 swims
1000 Freestyle SCY 12:10.98 1 swim
1650 Freestyle SCY 19:32.53 4 swims
50 Backstroke SCY 40.29 5 swims
100 Backstroke SCY 1:04.62 11 swims
200 Backstroke SCY 2:12.30 11 swims
50 Breaststroke SCY 35.03 6 swims
100 Breaststroke SCY 1:10.30 13 swims
200 Breaststroke SCY 2:29.41 14 swims
50 Butterfly SCY 40.82 5 swims
100 Butterfly SCY 1:04.22 4 swims
200 Butterfly SCY 2:33.06 1 swim
100 Individual Medley SCY 1:06.09 5 swims
200 Individual Medley SCY 2:15.08 15 swims
400 Individual Medley SCY 4:45.51 7 swims
50 Freestyle LCM 31.18 7 swims
100 Freestyle LCM 1:06.57 10 swims
200 Freestyle LCM 2:21.81 9 swims
400 Freestyle LCM 4:52.50 7 swims
800 Freestyle LCM 9:59.18 2 swims
50 Backstroke LCM 34.70 3 swims
100 Backstroke LCM 1:15.00 6 swims
200 Backstroke LCM 2:34.91 6 swims
50 Breaststroke LCM 38.49 3 swims
100 Breaststroke LCM 1:22.02 16 swims
200 Breaststroke LCM 2:52.98 13 swims
50 Butterfly LCM 33.45 3 swims
100 Butterfly LCM 1:15.81 7 swims
200 Butterfly LCM 2:59.57 2 swims
200 Individual Medley LCM 2:36.27 16 swims
400 Individual Medley LCM 5:31.42 5 swims