AM
Alex Chesiro Masai

Alex Chesiro Masai

KENKENMen
Birth dateFeb 5, 1997
Height-
Weight-

Competing at the international level with a focus on excellence. As a registered World Athletics competitor, they have participated consistently in track and field events across national and international competitions. Their dedication to the sport reflects a genuine passion for athletic achievement and personal improvement. Through years of training and competition, they have developed the skills and mental toughness necessary to compete at elite levels. Their involvement in various meets has provided valuable experience against strong international opposition.

Their athletic journey has been marked by steady development and a commitment to pushing their personal limits. Each competition serves as an opportunity to refine technique and build strength in their chosen disciplines. Their performances demonstrate the result of dedicated training and an unwavering focus on becoming a better athlete. The competitive experiences they have gained have shaped them into a capable and determined competitor.

Looking forward, this athlete continues to work toward achieving new personal bests and representing their country with pride. Their ongoing commitment to athletics extends beyond individual success, as they contribute to their community and inspire others through their dedication. With rigorous training and a strategic approach to competition, they pursue their goals while maintaining the discipline and passion that define elite athletic performance.

Key facts
Marathon
2:04:37
5000 Metres Short Track
13:18.96
2026 season best
2:05:32
Apr 20, 2026 · Boston, MA (USA)
Last competition
B.A.A. 10K
Jun 21, 2026 · 28:31
Age
29 years old

As of Sep 15, 2026: Marathon 2:04:37 (#71 all-time), 5000 Metres Short Track 13:18.96, 2026 season best 2:05:32 (Apr 20, 2026, Boston, MA (USA)) · Last competition: B.A.A. 10K, Jun 21, 2026, 28:31 · 29 years old

Performance Charts

Season bests

SeasonDisciplineResultWindDateTrendCompetitions
2026
10Kilometr
28:31-Jun 21, 2026
B.A.A. 10K
2026
Semi
1:00:51-Jan 11, 2026
Aramco Houston Half Marathon
2026
Marathon
2:05:32-Apr 20, 2026
Boston Marathon
2025
10Kilometr
29:24-Jun 22, 2025
B.A.A. 10K, Boston, MA
2025
RoadRace
31:28-Aug 17, 2025
ASICS Falmouth Road Race, Falmouth High School, Falmouth, MA - Non-standard distance: 11,265m - 7 Miles
2025
Semi
1:01:04-Jan 19, 2025
Aramco Houston Half Marathon
2025
Marathon
2:04:37-Oct 12, 2025
Bank of America Chicago Marathon
2024
5000m
13:18.96-Feb 10, 2024
Boston University David Hemery Valentine Invitational, Boston Univ. Track & Tennis Center, Boston, MA (i)
2024
5000m-short-track
13:18.96-Feb 10, 2024
Boston University David Hemery Valentine Invitational, Boston Univ. Track & Tennis Center, Boston, MA (i)
2024
5Kilometre
13:48-Apr 13, 2024
B.A.A. 5K
2024
10000m
27:47.86-Mar 16, 2024
The TEN
2024
10Kilometr
28:29-Jun 23, 2024
B.A.A. 10K
2024
Semi
1:01:46-Jan 14, 2024
Aramco Houston Half Marathon
2024
Marathon
2:08:51-Oct 13, 2024
Bank of America Chicago Marathon
2023
5Kilometre
13:27-Apr 15, 2023
B.A.A. 5K
2023
CrossCount
23:23-Nov 30, 2023
Cross Champs, Austin, TX - XC 8.0km
2023
10000m
27:42.80-Mar 4, 2023
The TEN
2023
10Kilometr
28:09-Jun 25, 2023
B.A.A. 10K, Boston, MA
2022
3000m
7:47.63-Jan 30, 2022
Boston Univ. Track & Tennis Center, Boston, MA (USA) (i)
2022
3000m-short-track
7:47.63-Jan 30, 2022
Boston Univ. Track & Tennis Center, Boston, MA (USA) (i)
2022
5000m-short-track
13:22.53-Feb 12, 2022
Boston Univ. Track & Tennis Center, Boston, MA (USA) (i)
2022
5000m
13:22.53-Feb 12, 2022
Boston Univ. Track & Tennis Center, Boston, MA (USA) (i)
2022
CrossCount
24:18-Dec 1, 2022
Cross Champs, Austin, TX - XC 8.0km
2022
10Kilometr
28:29-Jun 26, 2022
Boston, MA (USA)
2022
10000m
28:38.53-Jun 10, 2022
Portland Track Festival
2022
RoadRace
32:55-Aug 21, 2022
2022 ASICS Falmouth Road Race
2021
5000m
13:24.68-Jun 11, 2021
NCAA Div. I Outdoor Championships
2021
10000m
27:45.19-Jun 9, 2021
NCAA Div. I Outdoor Championships
2020
Mile
4:01.67-Oct 23, 2020-Icahn Stadium, New York, NY (USA)
2020
3000m-short-track
7:53.04-Feb 15, 2020
Boston Univ. Track & Tennis Center, Boston, MA (USA) (i)
2020
3000m
7:53.04-Feb 15, 2020
Boston Univ. Track & Tennis Center, Boston, MA (USA) (i)
2020
5000m
13:28.55-Feb 28, 2020
Boston Univ. Track & Tennis Center, Boston, MA (USA) (i)
2020
5000m-short-track
13:28.55-Feb 28, 2020
Boston Univ. Track & Tennis Center, Boston, MA (USA) (i)
2020
10000m
28:11.05-Dec 5, 2020
JSerra Catholic HS, San Juan Capistrano, CA (USA)
2019
3000m
7:59.49-Feb 9, 2019
Boston, MA (USA) (i)
2019
3000m-short-track
7:59.49-Feb 9, 2019
Boston, MA (USA) (i)
2019
5000m-short-track
13:53.65-Feb 24, 2019
Boston, MA (USA) (i)
2019
5000m
13:53.65-Feb 24, 2019
Boston, MA (USA) (i)
2019
10Kilometr
28:43-Nov 15, 2019
Buffalo, NY (USA)
2019
10000m
29:39.36-Apr 13, 2019
Lewisburg, PA (USA)
2018
3000m
8:14.69-Feb 24, 2018
NY (USA) (i)
2018
3000m-short-track
8:14.69-Feb 24, 2018
NY (USA) (i)
2018
5000m
14:00.07-Apr 26, 2018
Philadelphia Penn Relays, Philadelphia, PA - USA vs. the World

2026

4 performances
DisciplineResultWindDateCompetitions
10Kilometr
28:31-Jun 21B.A.A. 10K
Marathon
2:05:32-Apr 20Boston Marathon
Semi
1:02:09-Mar 15United Airlines NYC Half
Semi
1:00:51-Jan 11Aramco Houston Half Marathon

2025

6 performances
DisciplineResultWindDateCompetitions
Marathon
2:04:37-Oct 12Bank of America Chicago Marathon
RoadRace
31:28-Aug 17ASICS Falmouth Road Race, Falmouth High School, Falmouth, MA - Non-standard distance: 11,265m - 7 Miles
10Kilometr
29:24-Jun 22B.A.A. 10K, Boston, MA
Marathon
2:08:03-Apr 13NN Marathon Rotterdam
Semi
1:01:17-Mar 16United Airlines NYC Half
Semi
1:01:04-Jan 19Aramco Houston Half Marathon

2024

8 performances

2023

7 performances

2022

8 performances
DisciplineResultWindDateCompetitions
CrossCount
24:18-Dec 1Cross Champs, Austin, TX - XC 8.0km
RoadRace
32:55-Aug 212022 ASICS Falmouth Road Race
10Kilometr
28:29-Jun 26B.A.A. 10K, Boston, MA
10000m
28:38.53-Jun 11Portland Track Festival
10000m
28:38.53-Jun 10Portland Track Festival
10Kilometr
28:54-Apr 2Cooper River Bridge Run, Charleston, SC
5000m-short-track
13:22.53-Feb 12Boston University David Hemery Valentine Invitational, Boston Univ. Track & Tennis Center, Boston, MA (i) - Seeded
3000m-short-track
7:47.63-Jan 30Boston University John Thomas Terrier Classic, Boston Univ. Track & Tennis Center, Boston, MA (i)

2021

8 performances
DisciplineResultWindDateCompetitions
10000m
27:45.19-Jun 11NCAA Div. I Outdoor Championships
5000m
13:24.68-Jun 11NCAA Div. I Outdoor Championships
10000m
27:45.19-Jun 9NCAA Div. I Outdoor Championships
5000m
13:42.09-May 28NCAA East Preliminary, University of North Florda Jax Track at Hodges Stadium, Jacksonville, FL
10000m
28:29.97-May 26NCAA East Preliminary, University of North Florda Jax Track at Hodges Stadium, Jacksonville, FL
5000m
13:51.48-May 1CAA Ch., Sentara Park, Harrisonburg, VA
10000m
28:27.35-Apr 2Stanford Invitational, Cobb Track and Angell Field, Palo Alto, CA
5000m
13:59.31-Mar 20Fordham Icahn Invitational, Icahn Stadium, New York, NY

2020

5 performances
DisciplineResultWindDateCompetitions
10000m
28:11.05-Dec 5The Track Meet, JSerra Catholic HS, San Juan Capistrano, CA
Mile
4:01.67-Oct 23Big City Invitational presented by TOM + Bakline, Icahn Stadium, New York, NY
5000m-short-track
13:28.55-Feb 28Boston University Last Chance Invitational, Boston Univ. Track & Tennis Center, Boston, MA (i) - Invitational Events
3000m-short-track
7:53.04-Feb 15BU David Hemery Valentine Invitational, Boston Univ. Track & Tennis Center, Boston, MA (i)
3000m-short-track
7:54.34-Jan 25Dr. Norb Sander Columbia Challenge

2019

4 performances
DisciplineResultWindDateCompetitions
10Kilometr
28:43-Nov 15NCAA Division I Northeast Region Cross Country Ch. (road), Buffalo, NY
10000m
30:09.10-May 23NCAA East Preliminary Round, Jacksonville, FL
5000m
14:08.11-Apr 25Penn Relays, Philadelphia, PA - USA vs. the World
10000m
29:39.36-Apr 13Bison Classic, Lewisburg, PA - Invitational Events
Showing 1 - 50 of 57

Honours

🥉

Bank of America Chicago Marathon

Marathon

2025
FAQ

Frequently asked questions

What is Alex Chesiro Masai's Marathon personal best?

Alex Chesiro Masai's Marathon personal best is 2:04:37, set on Oct 12, 2025 in Chicago, IL (USA), #71 on the all-time list.

Which events does Alex Chesiro Masai compete in?

Alex Chesiro Masai competes in the Marathon and 5000 Metres Short Track.

How did Alex Chesiro Masai perform in 2026?

2026 season best: 2:05:32, set on Apr 20, 2026 in Boston, MA (USA). Last competition: B.A.A. 10K on Jun 21, 2026, 28:31.