Morgan Diefendorf
United StatesActive- Events
- Marathon · 800 Metres Short Track
Morgan Diefendorf is a United States sprinter. He competes primarily in the 400m, 800m and 800m.
His personal bests include 59.72 in the 400m, 2:16.40 in the 800m, 2:19.25 in the 800m, 4:46.05 in the 1500m and 5:08.23 in the Mile. He is currently active on the international athletics circuit, representing United States.
Personal best · Marathon2:44:23
2026 season best2:44:23Jan 11, 2026 · Houston, TX
Personal best · 800 Metres Short Track2:16.40
Last competitionChevron Houston MarathonJan 11, 2026 · 2:44:23
As of Nov 13, 2026: Marathon 2:44:23, 800 Metres Short Track 2:16.40, 2026 season best 2:44:23 (Jan 11, 2026, Houston, TX (USA)) · Last competition: Chevron Houston Marathon, Jan 11, 2026, 2:44:23
Personal bests
WA points calculator →DisciplineResultAll-time
800mIndoorID 20182:16.40447 pts–
MileIndoorID 20185:08.23421 pts–
Progression
| Season | Discipline | Result | Wind | Date | Competitions |
|---|---|---|---|---|---|
| 2026 | Marathon | 2:44:23 | – | Jan 11, 2026 | Chevron Houston Marathon |
| 2025 | Semi | 1:22:31 | – | Jan 19, 2025 | Aramco Houston Half Marathon |
| 2018 | 600m-short-track Indoor | 1:38.34 | – | Jan 20, 2018 | Nampa, ID (USA) (i) |
| 2018 | 600m-short-track | 1:38.34 | – | Jan 20, 2018 | – |
| 2018 | 600m Indoor | 1:38.34 | – | Jan 20, 2018 | Nampa, ID (USA) (i) |
| 2018 | 800m-short-track Indoor | 2:16.40 | – | Feb 3, 2018 | Nampa, ID (USA) (i) |
| 2018 | 800m-short-track | 2:16.40 | – | Feb 3, 2018 | – |
| 2018 | 800m | 2:19.25 | – | May 11, 2018 | – |