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Crown Green Handicap

John Wyburn

Team: Sea DogDivision: Division CLast updated: 10/24/2026

Rating

727

Current Handicap

11
Honours
Season:

48

Matches Played

16

Wins

32

Losses

33%

Win Rate

7.7

Avg Win Margin

10.8

Avg Loss Margin

10-13

Home Record

6-19

Away Record

100%

Handicap Confidence

Very Reliable
48 / 33 matches for full confidence· Last recorded match: 8/13/2019

A large recent sample: 48 matches in the 2022, 2023, 2024, 2025, 2026 window, comfortably past the 33-match benchmark for full confidence. The handicap is stable and only shifts as form changes.

Milestones

Career

No career milestones yet — keep bowling!

Next goal: Decade Player4/10
✦SEASON HIGHLIGHTS

No season milestones recorded yet.

Handicap Trend

All Time · 48 matches

+11 Rising
Win on the night Loss on the nightLower handicap = stronger player

The line re-checks the handicap after every match — from results, winning and losing margins, the strength of who was played, and home or away. Each dot is the number that applied going into the next game.

22 Jun2 Aug17 May5 Jul1 Aug30 May3 Jul13 Aug-13714

Gives 11 more chalks than at the start of this period.

Started0
Lowest0
Current11
Win Percentage(35%)
33%
score-0.33→contribution-0.12
Avg Winning Margin(23%)
7.7
score-0.05→contribution-0.01
Avg Losing Margin(15%)
10.8
score-0.46→contribution-0.07
Recent Form (last 20)(10%)
35%
score-0.30→contribution-0.03
Opponent Strength(15%)
891
score-0.46→contribution-0.07
Weighted Score-0.303
Sample Size Confidence
100%(48/33 matches)
Rating879 → shrunk 879→ adjusted 727
Handicap
11

Formula: Rating = 1000 + (weighted score × 400). Each factor is normalized to −1…+1, multiplied by its weight, then summed. Window: factors are computed from the Handicap Calculation Years only (2022, 2023, 2024, 2025, 2026), excluding walkovers — the same window the official recalculation uses. Bayesian shrinkage: the raw rating is pulled toward 1000 by confidence (window matches ÷ 33, an adaptive threshold set by the last recalculation). Offsets: division and B/C/D team offsets are then applied, weighted by where each window match was played. Recency blend: the calculation years are re-weighted at up to 40% by match volume. Players with a long career but fewer than 5 window matches fall back to their full career record. Rating maps to handicap 0–15 (lower = stronger) via the league's spread multiplier.

League

16W32L48 matches·33.3% win rate
ClubSeasonsDivision(s)PWLWin %
Sea Dog2017–2019Division C46163034.8%
Albany B2016Division C2020%
DateOpponentH/AScoreResultMarginCompetitionDivision
8/13/2019Roy WestonA16-21LOSS-5LeagueDivision C
8/8/2019Mike WalshH21-14WIN+7LeagueDivision C
8/1/2019Heather AndrewsH4-21LOSS-17LeagueDivision C
7/31/2019vs Hoylake Central & MelroseA7-21LOSS-14LeagueDivision C
7/25/2019Gordon CapperH21-6WIN+15LeagueDivision C
7/18/2019Roger HampsonA6-21LOSS-15LeagueDivision C
7/3/2019vs Pensby CA8-21LOSS-13LeagueDivision C
7/2/2019John HolmesH14-21LOSS-7LeagueDivision C
6/27/2019Neville WardH21-17WIN+4LeagueDivision C
6/25/2019vs Bromborough Pool BA21-20WIN+1LeagueDivision C
6/20/2019Barry TilstonA19-21LOSS-2LeagueDivision C
6/6/2019Maureen PercivalH21-5WIN+16LeagueDivision C
5/30/2019Brenda ChamberlainA21-1WIN+20LeagueDivision C
5/23/2019Brenda ThompsonH3-21LOSS-18LeagueDivision C
5/9/2019Neil PowellH12-21LOSS-9LeagueDivision C
8/21/2018Muriel EvansA4-21LOSS-17LeagueDivision C
8/16/2018Andrew ParnellH20-21LOSS-1LeagueDivision C
8/9/2018Keith GentleH21-9WIN+12LeagueDivision C
8/1/2018vs Oxton Cons CA10-21LOSS-11LeagueDivision C
7/25/2018vs Hoylake Central & MelroseA4-21LOSS-17LeagueDivision C
7/24/2018Dave CamplinH10-21LOSS-11LeagueDivision C
7/19/2018Anthony ClareA7-21LOSS-14LeagueDivision C
7/12/2018Howard FernA21-13WIN+8LeagueDivision C
7/10/2018Alex NormanA21-18WIN+3LeagueDivision C
7/5/2018Dereck SnedkerH21-16WIN+5LeagueDivision C
7/3/2018vs Thingwall BA21-17WIN+4LeagueDivision C
6/28/2018Ethel JonesH21-15WIN+6LeagueDivision C
6/14/2018Jacqueline NewshamH7-21LOSS-14LeagueDivision C
5/31/2018Sally PovallH10-21LOSS-11LeagueDivision C
5/23/2018vs Pensby CA12-21LOSS-9LeagueDivision C
5/17/2018Larry BakerH21-14WIN+7LeagueDivision C
5/15/2018Dave FinlayH21-15WIN+6LeagueDivision C
8/22/2017Scott NewshamH9-21LOSS-12LeagueDivision C
8/17/2017Peter ProwseA17-21LOSS-4LeagueDivision C
8/15/2017Chris Griffiths-griptonH5-21LOSS-16LeagueDivision C
8/10/2017John HenshallA10-21LOSS-11LeagueDivision C
8/2/2017vs Pensby CA12-21LOSS-9LeagueDivision C
8/1/2017Len MastermanH10-21LOSS-11LeagueDivision C
7/11/2017Mark McaseyA18-21LOSS-3LeagueDivision C
7/5/2017vs Oxton Cons CA6-21LOSS-15LeagueDivision C
7/4/2017Eric PercivalH13-21LOSS-8LeagueDivision C
6/29/2017Phil SpencerA11-21LOSS-10LeagueDivision C
6/22/2017Robert LigginsH21-19WIN+2LeagueDivision C
6/15/2017Des ClarkeH18-21LOSS-3LeagueDivision C
6/8/2017Jamillah BallA16-21LOSS-5LeagueDivision C
5/16/2017Elizabeth GreenA21-14WIN+7LeagueDivision C
5/10/2016Dave PattersonA4-21LOSS-17LeagueDivision C
4/26/2016Robert KellA6-21LOSS-15LeagueDivision C
Geoff Clare Trophy5 games · 1W
20192 rounds
RoundOpponentTeamScoreResultTeam
Quarters RoundJoan JonesBromborough Recs B21-21LOSSWON
Semi Final RoundMally LloydBebington Park21-12WINLOST
20181 round
RoundOpponentTeamScoreResultTeam
Preliminary RoundJohn HenshallNeston14-21LOSSLOST
20172 rounds
RoundOpponentTeamScoreResultTeam
Round of 16 RoundMike WalshThingwall B7-21LOSSWON
Quarters RoundNeil PowellBebington Park16-21LOSSLOST
George ONeill Trophy4 games · 0W
20192 rounds
RoundOpponentTeamScoreResultTeam
Round of 32 RoundJohn Burke / Sarah ParnellPensby C8-15LOSSWON
Round of 16 RoundBill Naylor / Malcolm GilfoyleHeswall Rbl B11-15LOSSLOST
20172 rounds
RoundOpponentTeamScoreResultTeam
Round of 32 RoundMatthew Brady / Paul QuinlanTixall C14-15LOSSWON
Round of 16 RoundRita Gunnigle / Sue ShawPensby C13-15LOSSLOST
Leverhulme Cup1 games · 0W
20171 round
RoundOpponentTeamScoreResultTeam
Round of 32 RoundKevin McloughlinBebington Park6-21LOSSLOST

Current Streak

1losses

In a slump

Longest Win Run

5

Career best winning streak

Longest Loss Run

10

Career worst losing streak

Last 540% win rate
LWLLW
Last 1040% win rate— steady
LWLLWLLLWW
OpponentWLTotalWin %Last Met
Pensby C0330%7/3/2019
Hoylake Central & Melrose0220%7/31/2019
Oxton Cons C0220%8/1/2018
Roy Weston0110%8/13/2019
Mike Walsh101100%8/8/2019
Heather Andrews0110%8/1/2019
Gordon Capper101100%7/25/2019
Roger Hampson0110%7/18/2019
John Holmes0110%7/2/2019
Neville Ward101100%6/27/2019
Biggest Win
Brenda Chamberlain (+20)5/30/2019
Heaviest Defeat
Brenda Thompson (-18)5/23/2019
Nemesis
Pensby C0-3 H2H
Best Season
201847% · 17 matches
Worst Season
201714% · 14 matches
Form Arc (1st half → 2nd half)
29% → 38%improving
Avg Opponent Rating Faced
83131 known · 17 unknown
vs Strong Opponents (rating ≥ 1000)
1-233% win rate
vs Weak Opponents (rating < 1000)
9-1932% win rate
Division C33.3%
16W·32L·48 played

Debut

Apr 26, 2016

Latest

Aug 13, 2019

Seasons Active

4 (3.3 yr span)

Matches / Season

12.0 (48 total)

Seasons

2016201720182019