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Mason Kostov

Age: 15 years old
Age Category: 15-16
Team: Asphalt Green Unified Aquatics | Metropolitan Swimming

Personal Best

Short course distance

Event Time Age Date Standard Next Standard Asphalt Green Unified Aquatics Metropolitan Swimming Eastern Zone USA
Free 50 Y 21.85 15 12/11/2025 AAA AAAA: 21.19 (+0.66s | 3.0%) 2 16 85 356
Free 100 Y 48.98 15 12/11/2025 AA AAA: 48.79 (+0.19s | 0.4%) 4 35 210 880
50 Free
23.65
23.65
100 Free
25.33
48.98
100 Free
48.98
Free 200 Y 1:54.37 15 01/17/2026 A AA: 1:51.79 (+2.58s | 2.3%) 15 127 723 1,000+
50 Free
25.76
25.76
100 Free
28.83
54.59
100 Free
54.59
150 Free
30.65
1:25.24
200 Free
29.13
1:54.37
100 Free
59.78
Breast 100 Y 1:06.32 15 01/17/2026 BB A: 1:05.89 (+0.43s | 0.6%) 14 111 547 1,000+
50 Breast
30.79
30.79
100 Breast
35.53
1:06.32
100 Breast
1:06.32
Fly 50 Y 25.58 15 01/17/2026 5 39 341 1,000+
Fly 100 Y 1:01.16 15 10/11/2025 BB A: 57.59 (+3.57s | 5.8%) 20 218 1,000+ 1,000+
50 Fly
28.23
28.23
100 Fly
32.93
1:01.16
100 Fly
1:01.16
Fly 200 Y 2:17.35 15 01/17/2026 BB A: 2:08.79 (+8.56s | 6.2%) 9 95 561 1,000+
50 Fly
30.12
30.12
100 Fly
33.38
1:03.50
100 Fly
1:03.50
150 Fly
36.54
1:40.04
200 Fly
37.31
2:17.35
100 Fly
1:13.85
IM 200 Y 2:10.35 15 12/11/2025 BB A: 2:09.39 (+0.96s | 0.7%) 20 140 736 1,000+
50 Fly
27.49
27.49
100 Back
33.04
1:00.53
100 IM
1:00.53
150 Breast
39.85
1:40.38
200 Free
29.97
2:10.35
100 IM
1:09.82

Long course distance

Event Time Age Date Standard Next Standard Asphalt Green Unified Aquatics Metropolitan Swimming Eastern Zone USA
Free 50 M 25.21 15 08/06/2025 AAA AAAA: 24.69 (+0.52s | 2.1%) 1 2 22 152
Free 100 M 55.77 15 08/06/2025 AAA AAAA: 53.79 (+1.98s | 3.6%) 1 3 26 253
Free 200 M 2:08.22 15 08/06/2025 AA AAA: 2:03.09 (+5.13s | 4.0%) 6 15 123 818
Back 50 M 31.71 15 08/06/2025 7 15 68 577
Breast 50 M 34.49 15 08/06/2025 3 6 31 377
Breast 100 M 1:21.80 15 08/06/2025 BB A: 1:16.69 (+5.11s | 6.2%) 6 26 216 1,000+
50 Breast
37.76
37.76
100 Breast
44.04
1:21.80
100 Breast
1:21.80
Fly 50 M 28.31 15 08/06/2025 2 5 31 275
IM 200 M 2:29.14 15 08/06/2025 A AA: 2:24.69 (+4.45s | 3.0%) 8 15 160 1,000+
50 Fly
30.48
30.48
100 Back
37.90
1:08.38
100 IM
1:08.38
150 Breast
45.88
1:54.26
200 Free
34.88
2:29.14
100 IM
1:20.76

Above are the fastest times that Mason Kostov has achieved in his swimming career. For each event, you can find Mason's best time, the corresponding time standard, as well as how much faster Mason needs to be to reach the next level. The last columns provide Mason rankings at the team and LSC levels. These rankings are based on the Mason'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.