Mackenzie O'Brien

Age: 9 years old
Age Category: 10 & under
Team: WILLIAMSTON HIGH SCHOOL | Unattached

Personal Best

Short course distance

Event

Time

Age

Date

Standard

Next Standard

WILLIAMSTON HIGH SCHOOL

Unattached

USA

Back 50 Y

27.61

11/21/2025

AAAA

Fly 100 Y

57.25

11/21/2025

AAAA

50 Fly

26.58

100 Fly

30.67

57.25

100 Fly

57.25

IM 200 Y

2:10.00

11/21/2025

AAAA

50 Fly

27.70

100 Back

31.63

59.33

100 IM

59.33

150 Breast

39.39

1:38.72

200 Free

31.28

2:10.00

100 IM

1:10.67

Long course distance

Event	Time		Age	Date	Standard	Next Standard	WILLIAMSTON HIGH SCHOOL	Unattached	Unattached	USA

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

Time Standards

Got the currrent age group time standard
Time standard for the next age group and the gap to reach it
Got the next age group’s time standard.

Short Course Distance

Event	Best Time	Sectionals	18U Spring Cup	Futures	Jrs - Winter	US Open	Summer Champ	SouthWestern Age Group Regional
Back 50 Y	27.61	N/A	N/A	N/A	N/A	N/A	N/A	36.49
Fly 100 Y	57.25	59.19	56.59 (+0.66s \| 1.2%)	56.59 (+0.66s \| 1.2%)	54.69 (+2.56s \| 4.5%)	53.49 (+3.76s \| 6.6%)	53.99 (+3.26s \| 5.7%)	1:20.19
IM 200 Y	2:10.00	2:10.49	2:06.39 (+3.61s \| 2.8%)	2:06.39 (+3.61s \| 2.8%)	2:02.19 (+7.81s \| 6.0%)	1:59.49 (+10.51s \| 8.1%)	2:00.59 (+9.41s \| 7.2%)	2:46.49

Long Course Distance

Event	Best Time	Sectionals	18U Spring Cup	Futures	Jrs - Winter	US Open	Summer Champ	SouthWestern Age Group Regional

Progression

See how Mackenzie O'Brien is improving gradually by choosing the distance and the stroke you are interested in. You can also compare the Mackenzie's time to another swimmer's and even view their profile for more information about them.

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Meets

See all the meets Mackenzie O'Brien has participated in and her achievement. The last event displayed is the most recent. For each event, you can find the Mackenzie's time, the progress against Mackenzie's best time, the corresponding time standard, as well as how much faster Mackenzie needs to be to reach the next level.

Event

Time

Progress

Standard

Next Standard

Age

Heat

Lane

Ranking

2025 MHSAA Division 3 Girls State Champs

11/21/2025

Holland

50 Y Back

27.61

AAAA

200 Y IM

2:10.00

AAAA

50 Fly

27.70

100 Back

31.63

59.33

100 IM

59.33

150 Breast

39.39

1:38.72

200 Free

31.28

2:10.00

100 IM

1:10.67

100 Y Fly

57.25

AAAA

50 Fly

26.58

100 Fly

30.67

57.25

100 Fly

57.25

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.