| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:09.47 | Saturday Night Showdown | 2025-06-14 |
| 100m Backstroke | 1:10.75 | OSC J.P. Fiset Invitational | 2025-12-11 |
| 100m Butterfly | 1:19.30 | Goldfins Winter Whiteout | 2026-02-06 |
| 100m Butterfly | 1:21.64 | Winter Solstice | 2025-11-29 |
| 100m Freestyle | 1:06.90 | Goldfins Winter Whiteout | 2026-02-06 |
| 100m Freestyle | 1:02.96 | OSC J.P. Fiset Invitational | 2025-12-11 |
| 100m IM | 1:17.81 | Norm Banfield Memorial Open Development Meet | 2025-10-03 |
| 200m Backstroke | 2:35.65 | ManSask Provincial Championships | 2025-07-10 |
| 200m Backstroke | 2:32.49 | OSC J.P. Fiset Invitational | 2025-12-11 |
| 200m Freestyle | 2:28.87 | Goldfins Winter Whiteout | 2026-02-06 |
| 200m Freestyle | 2:25.70 | Spooktacular Goldfins Invitational 49 | 2025-10-24 |
| 200m IM | 2:52.70 | ManSask Provincial Championships | 2025-07-10 |
| 200m IM | 2:47.47 | Winter Solstice | 2025-11-29 |
| 400m Freestyle | 5:11.43 | Goldfins Winter Whiteout | 2026-02-06 |
| 400m Freestyle | 5:06.19 | Winter Solstice | 2025-11-29 |
| 50m Backstroke | 31.90 | Goldfins Winter Whiteout | 2026-02-06 |
| 50m Backstroke | 31.52 | OSC J.P. Fiset Invitational | 2025-12-11 |
| 50m Breaststroke | 44.26 | Winter Classic | 2026-01-16 |
| 50m Breaststroke | 41.36 | Winter Solstice | 2025-11-29 |
| 50m Butterfly | 30.68 | ManSask Provincial Championships | 2025-07-10 |
| 50m Butterfly | 30.54 | OSC J.P. Fiset Invitational | 2025-12-11 |
| 50m Freestyle | 28.94 | Winter Classic | 2026-01-16 |
| 50m Freestyle | 27.74 | OSC J.P. Fiset Invitational | 2025-12-11 |
| 800m Freestyle | 10:55.93 | Winter Classic | 2026-01-16 |
| 800m Freestyle | 11:08.70 | Spooktacular Goldfins Invitational 49 | 2025-10-24 |
Petersen, Rowyn's top personal bests include 100m Backstroke (1:09.47), 100m Backstroke (1:10.75), 100m Butterfly (1:19.30), 100m Butterfly (1:21.64), 100m Freestyle (1:06.90).
Petersen, Rowyn swims for Saskatoon Lasers Swim Club.
Petersen, Rowyn has competed in 8 meets.