Cormac O'Brien

United StatesUnited StatesActive
Events
Mile Short Track · 3000 Metres Short Track

Cormac O'Brien is a United States sprinter. He competes primarily in the 200m, 1500m and Mile.

His personal bests include 26.80 in the 200m, 3:57.25 in the 1500m, 4:10.71 in the Mile, 8:15.42 in the 3000m and 14:31.71 in the 5000m. He is currently active on the international athletics circuit, representing United States.

Personal best · Mile Short Track4:10.71
2026 season best26.80Jan 30, 2026 · Harvard-Gordon Track and Tennis Center, Cambridge, MA (USA) (i)
2026 season best
Personal best · 3000 Metres Short Track8:15.42
Last competitionHarvard InvitationalJan 30, 2026 · 26.80
Harvard Invitational

As of Nov 13, 2026: Mile Short Track 4:10.71, 3000 Metres Short Track 8:15.42, 2026 season best 26.80 (Jan 30, 2026, Harvard-Gordon Track and Tennis Center, Cambridge, MA (USA) (i)) · Last competition: Harvard Invitational, Jan 30, 2026, 26.80

Personal bests

WA points calculator →
DisciplineResultAll-time
200mIndoorMA 202626.80426 pts–
1500mLA 2024United States 1500 m all-time list3:57.25888 pts–
MileIndoorSC 20254:10.71996 pts–
3000mIndoorKY 20258:15.42988 pts–
5000mFL 2025United States 5000 m all-time list14:31.71897 pts–
10000mNC 2025United States 10 000 m all-time list30:19.64927 pts–

Progression

SeasonDisciplineResultWindDateCompetitions
2026200m-short-track Indoor26.80–Jan 30, 2026Harvard Invitational
2026200m Indoor26.80–Jan 30, 2026Harvard Invitational
2026200m-short-track 26.80–Jan 30, 2026Harvard Invitational
2025Mile Indoor4:10.71–Feb 14, 2025Clemson Tiger Paw Invitational, Clemson Indoor Track & Field Complex, Clemson, SC (i)
2025mile-short-track Indoor4:10.71–Feb 14, 2025Clemson Tiger Paw Invitational, Clemson Indoor Track & Field Complex, Clemson, SC (i)
20253000m-short-track Indoor8:15.42–Mar 3, 2025ACC Indoor Track & Field Championships, Norton Sports Center, Louisville, KY (i)
20253000m Indoor8:15.42–Mar 3, 2025ACC Indoor Track & Field Championships, Norton Sports Center, Louisville, KY (i)
20255000m 14:31.71–May 2, 2025East Coast Relays, University of North Florda Jax Track at Hodges Stadium, Jacksonville, FL
FAQ

Frequently asked questions

Cormac O'Brien's Mile Short Track personal best is 4:10.71, set on Feb 14, 2025 in Clemson Indoor Track & Field Complex, Clemson, SC (USA) (i).

Cormac O'Brien competes in the Mile Short Track and 3000 Metres Short Track.

2026 season best: 26.80, set on Jan 30, 2026 in Harvard-Gordon Track and Tennis Center, Cambridge, MA (USA) (i). Last competition: Harvard Invitational on Jan 30, 2026, 26.80.