| All-time record | Played 2305, Won 906, Drawn 467, Lost 932 |
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| Record win in all competitions | Camptown Athletic 0–6 Mannion — 1981/82 Mainland League, Mannion 6–0 Large Victoria — 1985/86 Mainland League, Mannion 6–0 Beaumaris United — 1990/91 Mainland League, Swannbridge Town 2–8 Mannion — 2003/04 Mainland First Division Play-Off Semi-Final 2nd Leg |
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| Record home win in all competitions | Mannion 6–0 Large Victoria — 1985/86 Mainland League, Mannion 6–0 Beaumaris United — 1990/91 Mainland League |
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| Record away win in all competitions | Camptown Athletic 0–6 Mannion — 1981/82 Mainland League, Swannbridge Town 2–8 Mannion — 2003/04 Mainland First Division Play-Off Semi-Final 2nd Leg |
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| Record win in the league | Camptown Athletic 0–6 Mannion — 1981/82 Mainland League, Mannion 6–0 Large Victoria — 1985/86 Mainland League, Mannion 6–0 Beaumaris United — 1990/91 Mainland League |
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| Record home win in the league | Mannion 6–0 Large Victoria — 1985/86 Mainland League, Mannion 6–0 Beaumaris United — 1990/91 Mainland League |
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| Record away win in the league | Camptown Athletic 0–6 Mannion — 1981/82 Mainland League |
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| Record loss in all competitions | Partizan Warfield 10–0 Mannion — 2024/25 Warfield Cup Quarter-Final |
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| Record home loss in all competitions | Mannion 0–6 The Mavericks — 1988/89 Mainland League |
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| Record away loss in all competitions | Partizan Warfield 10–0 Mannion — 2024/25 Warfield Cup Quarter-Final |
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| Record loss in the league | Carmichael Town 8–1 Mannion — 1982/83 Beta League, Sunnymede Rangers 7–0 Mannion — 1984/85 Mainland League, Draycott Town 7–0 Mannion — 2017/18 Mainland First Division, Courton Lees 7–0 Mannion — 2024/25 Mainland League |
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| Record home loss in the league | Mannion 0–6 The Mavericks — 1988/89 Mainland League |
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| Record away loss in the league | Carmichael Town 8–1 Mannion — 1982/83 Beta League, Sunnymede Rangers 7–0 Mannion — 1984/85 Mainland League, Draycott Town 7–0 Mannion — 2017/18 Mainland First Division, Courton Lees 7–0 Mannion — 2024/25 Mainland League |
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| Highest scoring game | Swannbridge Town 2–8 Mannion — 2003/04 Mainland First Division Play-Off Semi-Final 2nd Leg, Partizan Warfield 10–0 Mannion — 2024/25 Warfield Cup Quarter-Final |
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| Most consecutive league wins | 9 — 2008/09 |
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| Most consecutive league draws | 4 — 2019/20 |
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| Most consecutive league defeats | 12 — 1993/94 |
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| Most consecutive league games without defeat | 18 — 2006/07 |
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| Most consecutive league games without victory | 20 — 2019/20–2020/21 |
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| Most consecutive home league wins | 9 — 1981/82 |
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| Most consecutive home league defeats | 6 — 1993/94 |
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| Most consecutive away league wins | 7 — 2023/24 |
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| Most consecutive away league defeats | 11 — 1982/83–1983/84 |
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| Most consecutive home league games without defeat | 24 — 2008/09–2009/10 |
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| Most consecutive home league games without victory | 11 — 2019/20–2020/21 |
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| Most consecutive away league games without defeat | 10 — 1996/97–1997/98, 2006/07 |
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| Most consecutive away league games without victory | 23 — 1982/83–1983/84 |
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