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Sailor · 2009–2026

Mark Chaffey

mpyc PHRF handicapExpress 37Handicap

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Events
99

343 races · 126 race wins

Win rate
21%

21% win rate · 21 of 99

Podium rate
72%

71 top-three finishes

Typically beats
49%

of boats faced (range 46%–52%, 823 boats)

Best class ranking
#26

Crew in Express 37 · rating 147

Longest win streak
17

race wins in a row

Most successful partnership
Dan Pruzan

2 wins · 4 podiums in 5 events together · 40% win rate

Best trio
Dan Pruzan & Liam Chaffey

2 wins · 3 podiums in 3 events, all three aboard

Biggest lift
Vincent Schweitzer

+34 points of fleet beaten when sailing together

Longest-running crew
Heidi Hall

Sep 2009 – Oct 2026 · 47 events

Nemesis
Kame Richards

3–55 head to head in 58 races

Rival
Bartz Schneider

56–55 in 112 races

Best day
2 Oct 2026

1-1-1-1-3 · Express 37 Nationals

Signature result
1st of 9

Express 37 Nationals · Express 37 · 2 Oct 2026

Partnerships · 60+ sailors

Most successful partnership: Dan Pruzan — 2 wins · 4 podiums in 5 events together · 40% win rate
  • Heidi Hall · Loca Motion, LocaMotion · Express 37, Handicap, PHRF handicap 47events 9 wins together · 33 podiums · 19% win rate · 58 of 189 races won Beat 53% of the fleet together(+2 vs. without) · best 1st · Sep 2009 – Oct 2026
  • Keith Vandevere · Loca Motion · Express 37, PHRF handicap 12events 2 wins together · 9 podiums · 17% win rate · 12 of 54 races won Beat 67% of the fleet together(+17 vs. without) · best 1st · Sep 2014 – May 2026
  • David Anderson · Loca Motion · Express 37, PHRF handicap 10events 2 wins together · 9 podiums · 20% win rate · 11 of 40 races won Beat 73% of the fleet together(+23 vs. without) · best 1st · Sep 2018 – May 2026
  • Chris Perle · Loca Motion · Express 37, PHRF handicap 10events 0 wins together · 6 podiums · 0% win rate · 4 of 52 races won Beat 56% of the fleet together(+4 vs. without) · best 2nd · Sep 2009 – May 2026
  • Ralph Treadway · Loca Motion · Express 37 7events 0 wins together · 1 podiums · 0% win rate · 2 of 49 races won Beat 42% of the fleet together(−11 vs. without) · best 3rd · Sep 2009 – Sep 2018
  • Liam Chaffey · Loca Motion · Express 37, PHRF handicap 7events 2 wins together · 6 podiums · 29% win rate · 11 of 37 races won Beat 76% of the fleet together(+25 vs. without) · best 1st · Sep 2016 – Sep 2025
  • Heidi Chaffey · Loca Motion · PHRF handicap 5events 0 wins together · 2 podiums · 0% win rate · 6 of 28 races won Beat 25% of the fleet together(−29 vs. without) · best 2nd · Mar 2018 – Aug 2018
  • Dan Pruzan · Loca Motion · Express 37 5events 2 wins together · 4 podiums · 40% win rate · 12 of 35 races won Beat 76% of the fleet together(+25 vs. without) · best 1st · Sep 2017 – Sep 2025
  • Dante Fiala · Loca Motion · Express 37, PHRF handicap 4events 1 wins together · 4 podiums · 4 events · 8 of 16 races won Beat 84% of the fleet together(+33 vs. without) · best 1st · May 2023 – May 2025
  • Jeff Kise · Loca Motion · Express 37 4events 1 wins together · 3 podiums · 4 events · 9 of 28 races won Beat 71% of the fleet together(+20 vs. without) · best 1st · Sep 2018 – Sep 2024

Lift shows how much better this sailor finishes with that partner aboard.

Rating history

-10961230201020132016201920222025Helm rating, all classesCrew rating, all classes

— Helm rating, all classes · - - Crew rating, all classes

Event history · 99

DateEventBoatClassRoleFinish
2 Oct 2026Express 37 NationalsLoca MotionExpress 37Skipper1st / 9
13 Jun 202635th Delta Ditch RunLoca MotionPHRF handicapSkipper67th / 87
23 May 20262026 California Offshore Race Week Series - Spinnaker CupLoca MotionExpress 37Skipper2nd / 5
13 May 20262026 | Fiasco RaceLoca MotionPHRF handicapSkipper1st / 4
25 Apr 20262026 Otter CupLoca MotionPHRF handicapSkipper4th / 8
19 Apr 20262026 | Lefler RaceLoca MotionPHRF handicapSkipper5th / 9
1 Apr 20262026 | Sunset SeriesLoca MotionPHRF handicapSkipper1st / 6
8 Mar 20262026 | PHRF Spring SeriesLoca MotionPHRF handicapSkipper1st / 3
22 Feb 20262026 | Tune-up RaceLoca MotionPHRF handicapSkipper1st / 3
2 Nov 20252025 | Crews Revenge RaceLoca MotionPHRF handicapSkipper2nd / 6
5 Oct 20252025 | PHRF Fall SeriesLoca MotionPHRF handicapSkipper7th / 10
11 Sep 20252025 Rolex Big Boat SeriesLoca MotionExpress 37Crew1st / 9
23 Aug 20252025 MBYRA Double AngleLoca MotionPHRF handicapSkipper3rd / 4
1 Jun 20252025 | PHRF Spring SeriesLoca MotionPHRF handicapSkipper8th / 9
24 May 20252025 California Offshore Race Week Series - Spinnaker CupLoca MotionPHRF handicapSkipper2nd / 6
12 Apr 20252025 | Año Nuevo RaceLoca MotionPHRF handicapSkipper2nd / 3
6 Apr 20252025 | Lefler RaceLoca MotionPHRF handicapSkipper4th / 7
26 Mar 20252025 | Sunset SeriesLoca MotionPHRF handicapSkipper4th / 14
26 Oct 20242024 | Kelp Cup RegattaStillwaterShieldsCrew1st / 4
22 Sep 20242024 | David Duncan RaceLoca MotionPHRF handicapSkipper1st / 4
22 Sep 20242024 | PHRF Fall SeriesLoca MotionPHRF handicapSkipper3rd / 3
12 Sep 20242024 Rolex Big Boat SeriesLoca MotionExpress 37Helm1st / 5
6 Jul 2024MBYRA Firecracker Regatta 2024Loca MotionPHRF handicapSkipper3rd / 3
21 Jun 20242024 | Commodores RegattaLoca MotionPHRF handicapSkipper1st / 6
2 Jun 20242024 | PHRF Summer SeriesLoca MotionPHRF handicapSkipper3rd / 3

Helm rating across all classes: 181, #20,809.Crew rating across all classes: 230, #12,331. Compiled from public results; not an official ranking.