P: 19 W: 12 D: 2 L: 5
Last meeting: 12 Mar 1990 — Llanelli v Sully (2-0)
| Season | Date | Match | Result | Score | Competition |
|---|---|---|---|---|---|
| 1974-75 | Llanelli v Sully | W | 3-1 | LEAGUE | |
| 1974-75 | Sully v Llanelli | W | 2-1 | LEAGUE | |
| 1975-76 | Llanelli v Sully | L | 1-6 | LEAGUE | |
| 1975-76 | Sully v Llanelli | D | 2-2 | LEAGUE | |
| 1976-77 | Llanelli v Sully | W | 5-2 | LEAGUE | |
| 1976-77 | 29 Jan 1977 | Sully v Llanelli | W | 2-1 | LEAGUE |
| 1977-78 | Sully v Llanelli | W | 4-2 | FA TROPHY | |
| 1977-78 | 27 Apr 1978 | Llanelli v Sully | W | 3-0 | LEAGUE |
| 1978-79 | Llanelli v Sully | L | 1-4 | LEAGUE | |
| 1978-79 | 24 Mar 1979 | Sully v Llanelli | L | 0-1 | LEAGUE |
| 1979-80 | Sully v Llanelli | D | 0-0 | LEAGUE | |
| 1979-80 | Llanelli v Sully | W | 4-1 | LEAGUE | |
| 1981-82 | 28 Nov 1981 | Llanelli v Sully | W | 1-0 | LEAGUE |
| 1981-82 | 03 Apr 1982 | Sully v Llanelli | L | 0-3 | LEAGUE |
| 1982-83 | 15 Jan 1983 | Llanelli v Sully | W | 1-0 | LEAGUE |
| 1982-83 | 23 Apr 1983 | Sully v Llanelli | W | 4-2 | LEAGUE |
| 1988-89 | 15 Oct 1988 | Sully v Llanelli | L | 1-3 | LEAGUE |
| 1988-89 | 04 Mar 1989 | Llanelli v Sully | W | 3-2 | LEAGUE |
| 1989-90 | 12 Mar 1990 | Llanelli v Sully | W | 2-0 | BRAINS SF |