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Greyson Duncan

Age: 18 years old
Age Category: 17-18
Team: Marlins Of Raleigh | North Carolina Swimming

Personal Best

Short course distance

Event Time Age Date Standard Next Standard Marlins Of Raleigh North Carolina Swimming Southern Zone USA
Free 50 Y 23.32 18 03/25/2026 A AA: 22.59 (+0.73s | 3.1%) 15 204 1,000+ 1,000+
Free 100 Y 50.50 Analysis 18 03/25/2026 A AA: 49.59 (+0.91s | 1.8%) 14 201 952 1,000+
50 Free
24.47
24.47
100 Free
26.03
50.50
100 Free
50.50
Free 200 Y 1:48.29 Analysis 18 03/25/2026 AA AAA: 1:44.99 (+3.30s | 3.0%) 12 135 591 1,000+
50 Free
24.94
24.94
100 Free
27.40
52.34
100 Free
52.34
150 Free
27.85
1:20.19
200 Free
28.10
1:48.29
100 Free
55.95
Free 500 Y 4:58.09 Analysis 18 02/19/2026 AA AAA: 4:45.39 (+12.70s | 4.3%) 12 96 443 1,000+
50 Free
27.30
27.30
100 Free
29.76
57.06
100 Free
57.06
150 Free
29.80
1:26.86
200 Free
30.11
1:56.97
100 Free
59.91
250 Free
30.44
2:27.41
300 Free
30.33
2:57.74
100 Free
1:00.77
350 Free
30.25
3:27.99
400 Free
30.55
3:58.54
100 Free
1:00.80
450 Free
30.42
4:28.96
500 Free
29.13
4:58.09
100 Free
59.55
Free 1000 Y 10:16.66 Analysis 18 02/19/2026 AA AAA: 9:57.29 (+19.37s | 3.1%) 10 63 198 769
50 Free
27.07
27.07
100 Free
29.86
56.93
100 Free
56.93
150 Free
30.34
1:27.27
200 Free
30.39
1:57.66
100 Free
1:00.73
250 Free
30.88
2:28.54
300 Free
30.88
2:59.42
100 Free
1:01.76
350 Free
31.10
3:30.52
400 Free
31.00
4:01.52
100 Free
1:02.10
450 Free
31.05
4:32.57
500 Free
31.43
5:04.00
100 Free
1:02.48
550 Free
31.22
5:35.22
600 Free
31.20
6:06.42
100 Free
1:02.42
650 Free
31.39
6:37.81
700 Free
31.44
7:09.25
100 Free
1:02.83
750 Free
31.63
7:40.88
800 Free
31.28
8:12.16
100 Free
1:02.91
850 Free
31.49
8:43.65
900 Free
31.37
9:15.02
100 Free
1:02.86
950 Free
31.49
9:46.51
1000 Free
30.15
10:16.66
100 Free
1:01.64
Free 1650 Y 17:29.67 Analysis 18 12/05/2025 A AA: 17:22.39 (+7.28s | 0.7%) 8 47 196 741
100 Free
59.22
59.22
100 Free
59.22
150 Free
31.48
1:30.70
200 Free
31.73
2:02.43
100 Free
1:03.21
500 Free
3:11.03
5:13.46
100 Free
3:11.03
650 Free
1:36.04
6:49.50
800 Free
1:36.24
8:25.74
100 Free
1:36.24
850 Free
32.05
8:57.79
900 Free
31.32
9:29.11
100 Free
1:03.37
1000 Free
1:04.39
10:33.50
100 Free
1:04.39
1200 Free
2:08.55
12:42.05
100 Free
2:08.55
1250 Free
31.71
13:13.76
1300 Free
31.85
13:45.61
100 Free
1:03.56
1400 Free
1:05.20
14:50.81
100 Free
1:05.20
1500 Free
1:04.33
15:55.14
100 Free
1:04.33
1550 Free
32.48
16:27.62
1600 Free
31.63
16:59.25
100 Free
1:04.11
1650 Free
30.42
17:29.67
Back 100 Y 57.78 Analysis 18 01/16/2026 BB A: 55.89 (+1.89s | 3.3%) 12 166 741 1,000+
50 Back
27.84
27.84
100 Back
29.94
57.78
100 Back
57.78
Back 200 Y 2:05.22 Analysis 18 03/25/2026 BB A: 2:03.29 (+1.93s | 1.5%) 12 127 513 1,000+
50 Back
29.28
29.28
100 Back
31.73
1:01.01
100 Back
1:01.01
150 Back
32.02
1:33.03
200 Back
32.19
2:05.22
100 Back
1:04.21
Breast 100 Y 1:05.14 Analysis 18 03/25/2026 BB A: 1:03.99 (+1.15s | 1.8%) 13 153 679 1,000+
50 Breast
30.31
30.31
100 Breast
34.83
1:05.14
100 Breast
1:05.14
Breast 200 Y 2:29.17 Analysis 18 10/24/2025 BB A: 2:19.09 (+10.08s | 6.8%) 12 158 685 1,000+
50 Breast
34.53
34.53
100 Breast
37.24
1:11.77
100 Breast
1:11.77
150 Breast
38.89
1:50.66
200 Breast
38.51
2:29.17
100 Breast
1:17.40
Fly 100 Y 53.74 Analysis 18 03/25/2026 A AA: 53.69 (+0.05s | 0.1%) 12 133 499 1,000+
50 Fly
25.26
25.26
100 Fly
28.48
53.74
100 Fly
53.74
Fly 200 Y 1:58.78 Analysis 18 03/25/2026 AA AAA: 1:55.09 (+3.69s | 3.1%) 11 80 265 854
50 Fly
26.05
26.05
100 Fly
29.56
55.61
100 Fly
55.61
150 Fly
30.93
1:26.54
200 Fly
32.24
1:58.78
100 Fly
1:03.17
IM 200 Y 2:02.10 Analysis 18 12/05/2025 A AA: 2:01.09 (+1.01s | 0.8%) 13 122 503 1,000+
50 Fly
25.64
25.64
100 Back
31.87
57.51
100 IM
57.51
150 Breast
36.18
1:33.69
200 Free
28.41
2:02.10
100 IM
1:04.59
IM 400 Y 4:23.57 Analysis 18 01/16/2026 A AA: 4:20.69 (+2.88s | 1.1%) 11 93 371 1,000+

Long course distance

Event Time Age Date Standard Next Standard Marlins Of Raleigh North Carolina Swimming Southern Zone USA
Free 50 M 26.96 18 06/18/2026 A AA: 26.19 (+0.77s | 2.9%) 14 173 843 1,000+
Free 100 M 58.35 Analysis 18 06/18/2026 A AA: 57.39 (+0.96s | 1.6%) 14 152 740 1,000+
Free 200 M 2:09.35 Analysis 18 06/18/2026 A AA: 2:05.59 (+3.76s | 2.9%) 14 131 642 1,000+
Free 400 M 4:40.66 Analysis 18 06/16/2023 BB A: 4:39.79 (+0.87s | 0.3%) 15 91 440 1,000+
Back 100 M 1:09.00 Analysis 18 06/18/2026 BB A: 1:06.49 (+2.51s | 3.6%) 13 126 557 1,000+
Back 200 M 2:33.47 Analysis 18 06/18/2026 BB A: 2:24.99 (+8.48s | 5.5%) 16 111 448 1,000+
Fly 100 M 1:02.49 Analysis 18 06/18/2026 A AA: 1:01.29 (+1.20s | 1.9%) 14 114 485 1,000+
Fly 200 M 2:26.25 Analysis 18 04/25/2026 BB A: 2:23.19 (+3.06s | 2.1%) 15 76 286 1,000+
50 Fly
32.63
32.63
100 Fly
36.55
1:09.18
100 Fly
1:09.18
150 Fly
37.53
1:46.71
200 Fly
39.54
2:26.25
100 Fly
1:17.07
IM 200 M 2:26.03 Analysis 18 06/18/2026 A AA: 2:21.19 (+4.84s | 3.3%) 13 116 530 1,000+

Above are the fastest times that Greyson Duncan has achieved in his swimming career. For each event, you can find Greyson's best time, the corresponding time standard, as well as how much faster Greyson needs to be to reach the next level. The last columns provide Greyson rankings at the team and LSC levels. These rankings are based on the Greyson's personal best, his current age category, and team; and are calculated from all the meets results.

Disclaimer: This Website is not affiliated with USA Swimming or any Local Swim Committee. The rankings and times displayed on this website are unofficial and should not be viewed as such. We update our information regularly, but we cannot guarantee that the data is accurate, timely, or complete. The only purpose of this website is entertainment. None of the information here should be used for university admission applications.