Mark Heffern

Mage 18IAMTNMSTUTWZMAC

111 plausible swims · 16 meets · 2023-03-23 → 2026-03-29

Personal records

EventCourseBest CutDateMeet
50 Freestyle SCY 22.36 AA+0.67s to AAA·Sectionals ✓+1.07s to Futures 2023-03-26 2023 Four Corners Speedo Sectionals - Austin venue
100 Freestyle SCY 45.36 AAAA·Futures ✓+0.97s to US Open 2026-03-26 2026 Four Corner Speedo Sectionals - Carmel - fast pool
200 Freestyle SCY 1:38.01 AAAA·Futures ✓+0.42s to US Open 2026-03-27 2026 Four Corner Speedo Sectionals - Carmel - fast pool
100 Breaststroke SCY 56.75 AAA+0.56s to AAAA·Futures ✓+1.76s to US Open 2026-03-19 2026 Western Zone Short Course Senior Champ
100 Butterfly SCY 48.80 AAAA·Futures ✓+0.61s to US Open 2026-03-28 2026 Four Corner Speedo Sectionals - Carmel - fast pool
200 Butterfly SCY 1:48.07 AAAA·Futures ✓+0.18s to US Open 2025-01-01 2025 Speedo Winter Junior Championships - West
200 Individual Medley SCY 1:48.81 AAAA·Futures ✓+0.32s to US Open 2026-03-29 2026 Four Corner Speedo Sectionals - Carmel - fast pool
400 Individual Medley SCY 3:54.57 AAAA·Futures ✓+1.88s to US Open 2025-01-01 2025 Speedo Winter Junior Championships - West
100 Freestyle LCM 52.89 AAA+0.20s to AAAA·Futures ✓+0.90s to US Open 2025-07-23 USA Swimming Futures Sacramento 2025
200 Freestyle LCM 2:02.82 AA+2.13s to AAA·Sectionals ✓+5.03s to Futures 2024-05-25 13th Annual Speedo Arizona Invitational venue
400 Freestyle LCM 4:19.03 AA+1.74s to AAA·Sectionals ✓+9.04s to Futures 2024-05-24 13th Annual Speedo Arizona Invitational venue
800 Freestyle LCM 9:27.23 A+3.94s to AA·+13.24s to Sectionals 2024-05-27 13th Annual Speedo Arizona Invitational venue
1500 Freestyle LCM 17:47.87 AA+36.88s to AAA·+7.88s to Sectionals 2024-05-27 13th Annual Speedo Arizona Invitational venue
100 Backstroke LCM 1:02.26 AA+0.87s to AAA·Sectionals ✓+1.67s to Futures 2024-05-26 13th Annual Speedo Arizona Invitational venue
50 Butterfly LCM 25.76 AAAA·Futures ✓+0.37s to US Open 2025-07-23 USA Swimming Futures Sacramento 2025
100 Butterfly LCM 56.06 AAAA·Futures ✓+0.17s to US Open 2025-07-23 USA Swimming Futures Sacramento 2025
200 Butterfly LCM 2:05.22 AAAA·Futures ✓+0.13s to US Open 2025-07-23 USA Swimming Futures Sacramento 2025 venue
200 Individual Medley LCM 2:07.36 AAAA·US Open ✓+2.67s to Nationals 2025-07-23 USA Swimming Futures Sacramento 2025

Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 18.

National cuts (Sectionals → Nationals) are the current-season meet qualifying times for the swimmer's zone and age group; ✓ marks the hardest cut already achieved.

Pool tags are a venue speed heuristic (median deviation of all swims there vs each swimmer's typical time) — see the venue page for the method.

Fastest relay legs

LegCourseTime StartRelayDateMeet
50 Freestyle SCY 21.07 flying 200 Free Relay (leg 3) 2025-12-12 2025 West Speedo Winter Juniors
100 Freestyle SCY 45.97 flying 400 Free Relay (leg 3) 2025-12-13 2025 West Speedo Winter Juniors
200 Freestyle SCY 1:45.42 flying 800 Free Relay (leg 2) 2023-03-25 2023 Four Corners Speedo Sectionals - Austin
100 Butterfly SCY 49.58 flying 400 Medley Relay (leg 3) 2025-12-11 2025 West Speedo Winter Juniors
200 Freestyle LCM 1:57.65 flying 800 Free Relay (leg 2) 2025-07-24 USA Swimming Futures Sacramento 2025

Reconstructed from relay split marks. Flat = lead-off (comparable to individual times); flying starts run ~0.5–0.7s fast and are not PRs.

IMX / IMR

IMX 17-18 · SCY

3141 points (3/6 events — incomplete)

EventTime Points
200 FL SCY 1:48.07 1048
200 IM SCY 1:48.81 1049
400 IM SCY 3:54.57 1044
500 FR SCY 0
200 BK SCY 0
200 BR SCY 0

IMR 17-18 · SCY

4094 points (4/5 events — incomplete)

EventTime Points
200 FR SCY 1:38.01 1068
100 BR SCY 56.75 960
100 FL SCY 48.80 1017
200 IM SCY 1:48.81 1049
100 BK SCY 0

Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.

PR splits

100 Freestyle SCY 45.36

21.87
23.49

Front half 21.87s · back half 23.49s

200 Freestyle SCY 1:38.01

23.16
25.03
24.97
24.85

Front half 48.19s · back half 49.82s

100 Butterfly SCY 48.80

22.81
25.99

Front half 22.81s · back half 25.99s

200 Individual Medley SCY 1:48.81

23.45
28.14
31.40
25.82

Front half 51.59s · back half 57.22s

100 Freestyle LCM 52.89 split/total mismatch

25.30
2.29

Front half 25.30s · back half 27.59s

200 Freestyle LCM 2:02.82

59.64
63.18

Front half 59.64s · back half 63.18s

400 Freestyle LCM 4:19.03

61.83
66.03
66.21
64.96

Front half 127.86s · back half 131.17s

1500 Freestyle LCM 17:47.87

65.20
71.12
71.69
71.73
71.72
72.21
71.47
72.09
71.76
71.26
71.58
71.66
71.95
72.28
70.15

100 Butterfly LCM 56.06 split/total mismatch

26.31
3.44

Front half 26.31s · back half 29.75s

200 Butterfly LCM 2:05.22

27.48
31.63
32.23
33.88

Front half 59.11s · back half 66.11s

200 Individual Medley LCM 2:07.36 split/total mismatch

27.09
33.52
37.70
29.05

Reaction time

fastest 0.62s average 0.655s slowest 0.76s 4 electronic starts

Start reaction over time faster starts higher

From electronically-timed starts only (~2% of corpus swims carry a reaction time). PRs with a recorded reaction show an RT chip in the splits section above.

Progression

Faster times are higher. One card per event, all courses & history.

50 Freestyle SCY 22.36 1 swim
100 Freestyle SCY 45.36 7 swims
200 Freestyle SCY 1:38.01 6 swims
100 Breaststroke SCY 56.75 10 swims
100 Butterfly SCY 48.80 10 swims
200 Butterfly SCY 1:48.07 11 swims
200 Individual Medley SCY 1:48.81 10 swims
400 Individual Medley SCY 3:54.57 13 swims
100 Freestyle LCM 52.89 8 swims
200 Freestyle LCM 2:02.82 2 swims
400 Freestyle LCM 4:19.03 1 swim
800 Freestyle LCM 9:27.23 1 swim
1500 Freestyle LCM 17:47.87 1 swim
100 Backstroke LCM 1:02.26 2 swims
50 Butterfly LCM 25.76 6 swims
100 Butterfly LCM 56.06 8 swims
200 Butterfly LCM 2:05.22 6 swims
200 Individual Medley LCM 2:07.36 8 swims