Tommy Chern

Mage 17IEMTPNRAINRBSMAC

358 plausible swims · 56 meets · 2021-06-04 → 2026-06-30

Personal records

Event	Course	Best	Cut	Date	Meet
50 Freestyle	SCY	24.55	BB+0.46s to A	2025-03-02	2025 PN CSC Mystery Meet venue
100 Freestyle	SCY	52.25	A+1.86s to AA	2026-01-18	2026 PN VAST 49th Annual Washington Open- APP venue
200 Freestyle	SCY	1:52.67	A+1.48s to AA	2024-03-24	2024 Northwest Region Age Group Regionals venue
500 Freestyle	SCY	4:19.16	AAAA	2024-10-10	2024 PN SMAC Fall Kick-Off Invitational
1000 Freestyle	SCY	10:14.25	AA+9.76s to AAA	2026-03-12	2026 Bellevue Club Premier Invite- Approved fast pool
1650 Freestyle	SCY	17:23.01	AA+33.22s to AAA	2025-11-16	2025 PN IST November Invitational venue
50 Backstroke	SCY	26.69	A+1.00s to AA	2025-11-23	2025 PN Nov. AGI, Division 2 (SMAC)
100 Backstroke	SCY	57.74	BB+0.45s to A	2026-03-13	2026 Bellevue Club Premier Invite- Approved fast pool
200 Backstroke	SCY	1:44.89	AAAA	2025-03-20	2025 Northwest Region Age Group Regionals
100 Breaststroke	SCY	1:05.67	BB+0.98s to A	2026-03-14	2026 Bellevue Club Premier Invite- Approved fast pool
200 Breaststroke	SCY	2:12.89	AA+3.80s to AAA	2025-01-16	2025 PN VAST 48th Annual Washington Open
50 Butterfly	SCY	26.03	A+0.44s to AA	2025-03-01	2025 PN CSC Mystery Meet
100 Butterfly	SCY	55.36	A+1.07s to AA	2026-02-08	2026 (WIAA) Metro(SeaKing District Il) BoysOB venue
200 Butterfly	SCY	1:56.95	AA+0.06s to AAA	2024-01-11	2024 PN VAST 47th Annual Washington Open
200 Individual Medley	SCY	1:52.09	AAAA	2024-03-21	2024 Northwest Region Age Group Regionals
400 Individual Medley	SCY	4:08.82	AAA+7.33s to AAAA	2025-10-22	1657244
50 Freestyle	LCM	27.47	A+0.78s to AA	2026-06-06	2026 PN VAST Summer Sprint & Dist. - Approved venue
100 Freestyle	LCM	59.61	A+1.52s to AA	2025-06-29	2025 PN SMAC Summer Classic Invitational venue
200 Freestyle	LCM	2:08.79	A+1.10s to AA	2025-06-01	2025 PN VAST Summer Sprints and Distance Chal venue
400 Freestyle	LCM	4:30.86	AA+10.27s to AAA	2025-07-19	2025 PN 13&O LC Senior Championships venue
800 Freestyle	LCM	9:16.98	AA+15.49s to AAA	2025-07-20	2025 PN 13&O LC Senior Championships venue
1500 Freestyle	LCM	17:48.57	AA+29.48s to AAA	2025-07-17	2025 PN 13&O LC Senior Championships venue
50 Backstroke	LCM	36.70	B+2.01s to BB	2022-06-05	2022 IE VS Apple Capital slow pool
100 Backstroke	LCM	1:07.63	BB+0.14s to A	2026-04-27	2026 PN SMAC Spring Showers LC Challenge
200 Backstroke	LCM	2:26.49	A+5.50s to AA	2025-06-14	2025 IST June Invtational venue
50 Breaststroke	LCM	31.52	AAA+0.83s to AAAA	2025-07-17	2025 PN 13&O LC Senior Championships
100 Breaststroke	LCM	1:18.64	BB+3.15s to A	2025-06-14	2025 IST June Invtational venue
200 Breaststroke	LCM	2:48.31	BB+3.62s to A	2025-06-26	2025 PN CSC 104th Annual Senior Seattle Open venue
50 Butterfly	LCM	29.04	A+0.15s to AA	2024-06-27	2024 PN CSC 103rd Annual Senior Seattle Open
100 Butterfly	LCM	1:04.10	A+1.71s to AA	2026-04-25	2026 PN SMAC Spring Showers LC Challenge venue
200 Butterfly	LCM	2:22.43	A+3.14s to AA	2025-07-20	2025 PN 13&O LC Senior Championships venue
200 Individual Medley	LCM	2:23.31	A+0.92s to AA	2026-06-30	2026 PN SMAC Summer Classic Invite- Approved venue
400 Individual Medley	LCM	5:01.69	AA+9.30s to AAA	2025-07-18	2025 PN 13&O LC Senior Championships venue

Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 17.

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.

IMX / IMR

IMX 17-18 · SCY

5617 points (6/6 events)

Event	Time	Points
500 FR SCY	4:19.16	1100
200 BK SCY	1:44.89	1088
200 BR SCY	2:12.89	767
200 FL SCY	1:56.95	827
200 IM SCY	1:52.09	960
400 IM SCY	4:08.82	875

IMR 17-18 · SCY

3586 points (5/5 events)

Event	Time	Points
200 FR SCY	1:52.67	703
100 BK SCY	57.74	607
100 BR SCY	1:05.67	619
100 FL SCY	55.36	697
200 IM SCY	1:52.09	960

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

PR splits

100 Freestyle SCY 52.25 RT 0.76s

25.20

27.05

Front half 25.20s · back half 27.05s

200 Freestyle SCY 1:52.67

26.26

28.36

28.83

29.22

Front half 54.62s · back half 58.05s

500 Freestyle SCY 4:19.16 split/total mismatch

28.39

58.88

89.73

120.89

292.53

324.99

276.78

306.24

29.00

61.15

93.89

127.08

1000 Freestyle SCY 10:14.25 RT 0.82s

27.60

30.07

30.75

30.60

30.94

31.22

31.05

31.36

31.34

31.19

30.69

30.68

30.88

30.95

30.53

30.79

31.43

31.08

31.19

29.91

Front half 306.12s · back half 308.13s

1650 Freestyle SCY 17:23.01

28.75

31.05

31.33

31.49

31.45

31.74

31.80

31.89

31.61

31.50

31.65

31.46

31.72

31.36

31.71

32.07

31.86

31.84

31.72

31.37

31.98

31.97

31.86

32.01

31.85

32.33

31.82

32.11

31.90

32.01

32.09

31.44

30.27

50 Backstroke SCY 26.69 split/total mismatch

149.42

30.42

30.95

30.84

Front half 179.84s · back half -153.15s

100 Backstroke SCY 57.74 RT 0.72s

28.16

29.58

Front half 28.16s · back half 29.58s

200 Backstroke SCY 1:44.89 split/total mismatch

29.84

31.96

32.06

32.59

Front half 61.80s · back half 43.09s

100 Breaststroke SCY 1:05.67 RT 0.77s

31.14

34.53

Front half 31.14s · back half 34.53s

200 Breaststroke SCY 2:12.89

33.35

70.60

108.07

145.46

30.29

64.09

98.51

132.89

100 Butterfly SCY 55.36

26.31

29.05

Front half 26.31s · back half 29.05s

200 Butterfly SCY 1:56.95

28.01

59.68

25.86

55.31

85.78

116.95

400 Individual Medley SCY 4:08.82 split/total mismatch

26.57

32.37

40.53

29.80

Front half 58.94s · back half 189.88s

200 Freestyle LCM 2:08.79 RT 0.82s

63.17

65.62

Front half 63.17s · back half 65.62s

400 Freestyle LCM 4:30.86 RT 0.87s

64.79

69.04

69.44

67.59

Front half 133.83s · back half 137.03s

800 Freestyle LCM 9:16.98 RT 0.90s

66.08

71.03

70.38

70.68

70.74

70.77

70.07

67.23

Front half 278.17s · back half 278.81s

1500 Freestyle LCM 17:48.57 RT 0.84s

66.82

72.05

72.73

72.42

71.63

72.50

72.20

71.37

72.02

71.85

71.24

71.63

71.04

71.60

67.47

200 Backstroke LCM 2:26.49 RT 0.77s

71.51

74.98

Front half 71.51s · back half 74.98s

200 Breaststroke LCM 2:48.31

83.08

85.23

Front half 83.08s · back half 85.23s

200 Butterfly LCM 2:22.43 RT 0.87s

67.67

74.76

Front half 67.67s · back half 74.76s

200 Individual Medley LCM 2:23.31

30.42

36.94

43.07

32.88

Front half 67.36s · back half 75.95s

400 Individual Medley LCM 5:01.69 RT 0.83s

65.77

77.46

89.96

68.50

Front half 143.23s · back half 158.46s

Reaction time

fastest 0.64s average 0.779s slowest 0.90s 113 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 24.55 8 swims

100 Freestyle SCY 52.25 13 swims

200 Freestyle SCY 1:52.67 13 swims

500 Freestyle SCY 4:19.16 24 swims

1000 Freestyle SCY 10:14.25 9 swims

1650 Freestyle SCY 17:23.01 7 swims

50 Backstroke SCY 26.69 1 swim

100 Backstroke SCY 57.74 15 swims

200 Backstroke SCY 1:44.89 15 swims

100 Breaststroke SCY 1:05.67 13 swims

200 Breaststroke SCY 2:12.89 11 swims

50 Butterfly SCY 26.03 2 swims

100 Butterfly SCY 55.36 13 swims

200 Butterfly SCY 1:56.95 26 swims

200 Individual Medley SCY 1:52.09 24 swims

400 Individual Medley SCY 4:08.82 12 swims

50 Freestyle LCM 27.47 10 swims

100 Freestyle LCM 59.61 11 swims

200 Freestyle LCM 2:08.79 14 swims

400 Freestyle LCM 4:30.86 8 swims

800 Freestyle LCM 9:16.98 6 swims

1500 Freestyle LCM 17:48.57 8 swims

50 Backstroke LCM 36.70 2 swims

100 Backstroke LCM 1:07.63 13 swims

200 Backstroke LCM 2:26.49 9 swims

50 Breaststroke LCM 31.52 3 swims

100 Breaststroke LCM 1:18.64 7 swims

200 Breaststroke LCM 2:48.31 10 swims

50 Butterfly LCM 29.04 6 swims

100 Butterfly LCM 1:04.10 13 swims

200 Butterfly LCM 2:22.43 10 swims

200 Individual Medley LCM 2:23.31 15 swims

400 Individual Medley LCM 5:01.69 7 swims