| Name | Club | E1 | Pld | New | +/- |
|---|---|---|---|---|---|
| Mike Maguire | Pentyrch | 1643 | 10 | 1678 | +35 |
| Dave Mahoney | Barry | 1410 | 21 | 1394 | -16 |
| Tom Martin | North Cardiff | 1240 | 8 | 1210 | -30 |
| Viv Martin | Pentyrch | 1647 | 9 | 1622 | -25 |
| Harshith Maruthireddy | Cardiff | 1238 | 23 | 1336 | +98 |
| Jack Mason | Cardiff | 969 | 5 | 964 | -5 |
| Ken Mason | Pontypridd | 1521 | 9 | 1536 | +15 |
| Joshua McKenna | Cardiff | 934 | 19 | 960 | +26 |
| Mike McLoughlin | Pentyrch | 1371 | 8 | 1359 | -12 |
| Alex Menzies | Cardiff | 1000 | 5 | 974 | -26 |
| Brenda Miles | Nelson | 1343 | 11 | 1404 | +61 |
| Phil Mitchell | Pontypridd | 1206 | 0 | 1206 | 0 |
| Hugh Morgan | Caerphilly | 1640 | 9 | 1640 | +0 |
| Richard Morgan | Pentyrch | 1350 | 6 | 1382 | +32 |
| Gwilym Moses | Bridgend | 1175 | 25 | 1130 | -45 |