swimstats

Mackenzie Shields

Fage 17CTEZMEMRNEABFBGSCGSCNYCYPPSCUNUN-01

926 plausible swims · 115 meets · 1998-04-02 → 2026-08-02

Personal records

EventCourseBest CutDateMeet
25 Freestyle SCY 17.10 2018-06-23 2018 ME LRSC Summer Sprint Meetvenue
50 Freestyle SCY 25.73 AA+0.74s to AAA·+0.94s to Sectionals 2026-01-01 2026 ne inst cup championship results
100 Freestyle SCY 54.36 AA+0.27s to AAA·+1.27s to Sectionals 2026-01-01 2026 ne inst cup championship results
200 Freestyle SCY 1:55.33 AAA+3.64s to AAAA·+0.34s to Sectionals 2026-01-01 2026 ne inst cup championship results
500 Freestyle SCY 5:01.91 AAA+0.62s to AAAA·Futures ✓+8.32s to Winter JNs 2026-03-28 2026 EZ SCY Sectional Meetvenue
1000 Freestyle SCY 10:22.98 AAAA·Sectionals ✓+2.49s to Futures 2026-03-26 2026 EZ SCY Sectional Meetvenue
1650 Freestyle SCY 17:23.93 AAAA·Sectionals ✓+9.54s to Futures 2026-03-29 2026 EZ SCY Sectional Meetvenue
25 Backstroke SCY 19.88 2019-06-23 2019 ME LRSC Sprint Meet - Approved
50 Backstroke SCY 28.58 AA+0.89s to AAA·+2.29s to Futures 2026-07-30 2026 NE CRA Prelim/final SCY meet
100 Backstroke SCY 48.04 AAAA·US Open ✓ 2026-01-01 mm7results2colnotstd(2)
200 Backstroke SCY 2:07.26 AA+0.27s to AAA·Sectionals ✓+3.07s to Futures 2024-12-21 2024 NE CS SCY New England Senior Meetvenue
25 Breaststroke SCY 20.02 2019-06-23 2019 ME LRSC Sprint Meet - Approvedvenue
50 Breaststroke SCY 33.38 AA+1.19s to AAA·+3.59s to Futures 2025-01-01 2024 New England Swimming Gold Championships
100 Breaststroke SCY 1:10.94 A+0.65s to AA·+2.75s to Sectionals 2026-01-01 2026 ne inst cup championship results
200 Breaststroke SCY 2:33.48 AA+6.69s to AAA·+4.09s to Sectionals 2026-01-01 2026 ne inst cup championship results
25 Butterfly SCY 26.81 2017-07-09 2017 ME SEAL Summery SYOAvenue
50 Butterfly SCY 28.65 A+0.06s to AA·+2.96s to Futures 2025-01-01 2024 New England Swimming Gold Championships
100 Butterfly SCY 1:03.45 A+2.56s to AA·+4.96s to Sectionals 2025-01-01 2024 New England Swimming Gold Championships
200 Butterfly SCY 2:20.80 A+5.21s to AA·+8.71s to Sectionals 2025-01-01 2024 New England Swimming Gold Championships
100 Individual Medley SCY 1:04.75 2026-08-02 2026 NE CRA Prelim/final SCY meetvenue
200 Individual Medley SCY 2:13.15 AA+2.56s to AAA·+2.46s to Sectionals 2026-01-01 2026 ne inst cup championship results
400 Individual Medley SCY 4:38.83 AA+0.64s to AAA·+0.44s to Sectionals 2026-03-27 2026 EZ SCY Sectional Meetvenue
50 Freestyle LCM 29.11 AA+0.72s to AAA·+0.82s to Sectionals 2025-01-01 2025 ne sac america s cup results
100 Freestyle LCM 1:02.71 AA+1.22s to AAA·+2.02s to Sectionals 2025-07-26 2025 NE CRA July LC P/Fand Specialty Meetvenue
200 Freestyle LCM 2:13.56 AA+0.47s to AAA·+2.67s to Sectionals 2026-07-10 2026 NE CS LCM Senior Championshipsvenue
400 Freestyle LCM 4:37.83 AAA+9.54s to AAAA·+0.14s to Sectionals 2026-07-25 2026 NE CS LCM 13&O Championshipsvenue
800 Freestyle LCM 9:31.19 AAA+15.20s to AAAA·+1.20s to Sectionals 2026-07-26 2026 NE CS LCM 13&O Championshipsvenue
1500 Freestyle LCM 17:59.19 AAA+18.80s to AAAA·Sectionals ✓+19.00s to Futures 2026-07-23 2026 NE CS LCM 13&O Championshipsvenue
50 Backstroke LCM 34.39 A+0.40s to AA·+3.50s to Futures 2023-07-15 2023 ME LCM CHAMPSvenue
100 Backstroke LCM 1:07.60 AAA+2.31s to AAAA·Sectionals ✓+0.81s to Futures 2026-07-25 2026 NE CS LCM 13&O Championshipsvenue
200 Backstroke LCM 2:27.87 AAA+6.38s to AAAA·+1.68s to Sectionals 2026-07-26 2026 NE CS LCM 13&O Championshipsvenue
50 Breaststroke LCM 49.83 +3.54s to B·+15.04s to Futures 2019-07-27 2019 ME Maine Swimming International Inviteslow pool
100 Breaststroke LCM 1:27.78 BB+3.59s to A·+9.89s to Sectionals 2025-03-29 2025 Speedo Sectional Championshipvenue
200 Breaststroke LCM 3:02.33 A+7.34s to AA·+12.94s to Sectionals 2025-06-12 GRIT Trials/Finals Meetvenue
50 Butterfly LCM 28.70 AAAA·Futures ✓+0.31s to Jr Nationals 2026-01-01 2026 NE CS 13&Over Championshipfast pool
100 Butterfly LCM 1:15.09 BB+2.80s to A·+8.80s to Sectionals 2024-07-28 2024 NE NSSC LCM Silvers Champsvenue
200 Individual Medley LCM 2:33.58 AA+3.69s to AAA·+5.19s to Sectionals 2026-06-27 2026 NE YNS June Prelims Finals Meetvenue
400 Individual Medley LCM 5:26.01 AA+7.92s to AAA·+5.52s to Sectionals 2026-07-10 2026 NE CS LCM Senior Championshipsvenue

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

LegCourseTime StartRelayDateMeet
50 Freestyle SCY 26.15 flat 200 Free Relay 2025-03-08 2025 NE GS NE Cup Championship
50 Freestyle SCY 25.49 flying 200 Free Relay (leg 3) 2025-02-28 2025 NE CRIM 15-18 AG Championships
50 Freestyle SCY 27.49 flying 200 Medley Relay (leg 4) 2022-03-20 2022 ME Winter Championships
100 Freestyle SCY 56.11 flat 400 Free Relay 2025-02-28 2025 NE CRIM 15-18 AG Championships
100 Freestyle SCY 56.21 flying 400 Medley Relay (leg 4) 2025-12-21 2026 NE NSSC Senior Championships
100 Freestyle SCY 54.36 flying 400 Free Relay (leg 2) 2025-03-07 2025 NE GS NE Cup Championship
200 Freestyle SCY 1:57.02 flying 800 Free Relay (leg 4) 2025-12-18 2026 NE NSSC Senior Championships
50 Backstroke SCY 29.21 flat 200 Medley Relay 2025-03-01 2025 NE CRIM 15-18 AG Championships
50 Breaststroke SCY 51.62 flying 200 Medley Relay (leg 2) 2018-05-20 2018 ME CMA Celebrating Michelle Arpin
50 Butterfly SCY 34.85 flying 200 Medley Relay (leg 3) 2021-05-02 2021 ME Winter Champs
50 Freestyle LCM 29.22 flat 200 Free Relay 2025-03-30 2025 Speedo Sectional Championship
50 Freestyle LCM 39.29 flying 200 Free Relay (leg 3) 2022-07-17 2022 ME SUMMER LCM CHAMPS
100 Freestyle LCM 1:05.09 flat 400 Free Relay 2023-07-15 2023 ME LCM CHAMPS
100 Freestyle LCM 1:00.82 flying 400 Free Relay (leg 4) 2026-07-26 2026 NE CS LCM 13&O Championships
200 Freestyle LCM 2:13.52 flat 800 Free Relay 2026-07-23 2026 NE CS LCM 13&O Championships
200 Freestyle LCM 2:15.49 flying 800 Free Relay (leg 3) 2025-03-28 2025 Speedo Sectional Championship
50 Backstroke LCM 36.81 flat 200 Medley Relay 2023-07-16 2023 ME LCM CHAMPS
100 Backstroke LCM 1:09.82 flat 400 Medley Relay 2026-07-25 2026 NE CS LCM 13&O 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

4780 points (6/6 events)

EventTime Points
500 FR SCY 5:01.91 955
200 BK SCY 2:07.26 819
200 BR SCY 2:33.48 734
200 FL SCY 2:20.80 651
200 IM SCY 2:13.15 782
400 IM SCY 4:38.83 839

IMR 17-18 · SCY

4136 points (5/5 events)

EventTime Points
200 FR SCY 1:55.33 876
100 BK SCY 48.04 1100
100 BR SCY 1:10.94 720
100 FL SCY 1:03.45 658
200 IM SCY 2:13.15 782

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

PR splits

100 Freestyle SCY 54.36 split/total mismatch

26.61
1.14

Front half 26.61s · back half 27.75s

200 Freestyle SCY 1:55.33 split/total mismatch

26.97
29.27
29.70
29.39

500 Freestyle SCY 5:01.91

27.69
29.70
30.47
31.17
30.71
30.84
30.95
30.68
30.32
29.38

Front half 149.74s · back half 152.17s

1000 Freestyle SCY 10:22.98

28.18
30.77
30.81
30.76
30.94
31.29
31.21
30.96
31.37
31.39
31.04
31.38
31.51
31.72
31.79
31.85
31.99
31.79
31.73
30.50

Front half 307.68s · back half 315.30s

1650 Freestyle SCY 17:23.93

28.11
30.64
31.19
31.48
31.64
31.60
31.72
31.79
31.91
32.09
31.44
31.54
31.94
32.22
32.55
31.95
31.99
31.89
31.89
31.74
31.70
32.27
32.46
31.94
32.31
31.72
31.81
32.01
32.22
31.41
31.29
31.20
30.27

100 Backstroke SCY 48.04 split/total mismatch

36.23
1.66

Front half 36.23s · back half 11.81s

200 Backstroke SCY 2:07.26

29.93
31.53
32.90
32.90

Front half 61.46s · back half 65.80s

100 Breaststroke SCY 1:10.94 split/total mismatch

33.46
4.02

Front half 33.46s · back half 37.48s

200 Breaststroke SCY 2:33.48 split/total mismatch

34.80
4.28
0.64
0.16

Front half 39.08s · back half 114.40s

100 Butterfly SCY 1:03.45 split/total mismatch

30.06
3.33

Front half 30.06s · back half 33.39s

200 Butterfly SCY 2:20.80 split/total mismatch

30.53
5.16
1.47
0.26

Front half 35.69s · back half 105.11s

100 Individual Medley SCY 1:04.75

29.67
35.08

Front half 29.67s · back half 35.08s

200 Individual Medley SCY 2:13.15 split/total mismatch

30.58
32.62
39.25
30.70

400 Individual Medley SCY 4:38.83

30.06
35.89
34.15
34.60
40.53
41.48
31.91
30.21

Front half 134.70s · back half 144.13s

100 Freestyle LCM 1:02.71

30.24
32.47

Front half 30.24s · back half 32.47s

200 Freestyle LCM 2:13.56

30.48
33.56
34.68
34.84

Front half 64.04s · back half 69.52s

400 Freestyle LCM 4:37.83

31.63
35.13
35.91
35.90
35.34
35.61
34.92
33.39

Front half 138.57s · back half 139.26s

1500 Freestyle LCM 17:59.19

32.19
35.10
35.63
35.57
35.41
35.69
35.86
35.90
36.05
35.98
36.09
36.14
36.39
36.35
36.62
36.22
36.54
36.28
36.67
36.23
36.02
36.17
36.00
36.68
36.52
36.45
37.31
36.36
36.09
34.68

Front half 534.97s · back half 544.22s

100 Backstroke LCM 1:07.60

32.82
34.78

Front half 32.82s · back half 34.78s

200 Backstroke LCM 2:27.87

34.14
37.36
37.72
38.65

Front half 71.50s · back half 76.37s

100 Breaststroke LCM 1:27.78

41.04
46.74

Front half 41.04s · back half 46.74s

200 Breaststroke LCM 3:02.33 split/total mismatch

42.04
48.62
49.84
49.59
40.81
46.99
47.73
46.80

100 Butterfly LCM 1:15.09

34.63
40.46

Front half 34.63s · back half 40.46s

200 Individual Medley LCM 2:33.58

34.78
38.84
45.78
34.18

Front half 73.62s · back half 79.96s

400 Individual Medley LCM 5:26.01

35.54
43.45
40.96
40.63
48.30
47.47
35.64
34.02

Front half 160.58s · back half 165.43s

Reaction time

fastest 0.68s average 0.688s slowest 0.70s 4 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.

25 Freestyle SCY 17.10 7 swims
50 Freestyle SCY 25.73 58 swims
100 Freestyle SCY 54.36 51 swims
200 Freestyle SCY 1:55.33 65 swims
500 Freestyle SCY 5:01.91 42 swims
1000 Freestyle SCY 10:22.98 14 swims
1650 Freestyle SCY 17:23.93 17 swims
25 Backstroke SCY 19.88 5 swims
50 Backstroke SCY 28.58 23 swims
100 Backstroke SCY 48.04 53 swims
200 Backstroke SCY 2:07.26 45 swims
25 Breaststroke SCY 20.02 9 swims
50 Breaststroke SCY 33.38 22 swims
100 Breaststroke SCY 1:10.94 43 swims
200 Breaststroke SCY 2:33.48 21 swims
25 Butterfly SCY 26.81 5 swims
50 Butterfly SCY 28.65 25 swims
100 Butterfly SCY 1:03.45 31 swims
200 Butterfly SCY 2:20.80 14 swims
100 Individual Medley SCY 1:04.75 22 swims
200 Individual Medley SCY 2:13.15 45 swims
400 Individual Medley SCY 4:38.83 30 swims
50 Freestyle LCM 29.11 14 swims
100 Freestyle LCM 1:02.71 23 swims
200 Freestyle LCM 2:13.56 33 swims
400 Freestyle LCM 4:37.83 30 swims
800 Freestyle LCM 9:31.19 13 swims
1500 Freestyle LCM 17:59.19 12 swims
50 Backstroke LCM 34.39 5 swims
100 Backstroke LCM 1:07.60 37 swims
200 Backstroke LCM 2:27.87 22 swims
50 Breaststroke LCM 49.83 2 swims
100 Breaststroke LCM 1:27.78 7 swims
200 Breaststroke LCM 3:02.33 4 swims
50 Butterfly LCM 28.70 2 swims
100 Butterfly LCM 1:15.09 7 swims
200 Individual Medley LCM 2:33.58 33 swims
400 Individual Medley LCM 5:26.01 28 swims