1999–2000 Welsh-Scottish League
Cardiff won the inaugural Welsh-Scottish League. However they lost their final match against Swansea at home thus losing an unbeaten home record that dated back to December 1997. The points system was complicated by the Rugby World Cup and only two points were awarded for a win prior to November 1999. Both Cardiff and Pontypridd were deducted points by playing Edinburgh during this World Cup period; although the matches were scheduled to take place outwith the World Cup.The top 5 Welsh teams plus Edinburgh and Glasgow qualified for next season's Heineken Cup.
| Team | P | W | D | L | PF | PA | +/- | Pts |
 Cardiff RFC | 22 | 18 | 1 | 3 | 879 | 504 | +375 | 59 |
| Newport RFC | 22 | 15 | 1 | 6 | 773 | 453 | +320 | 49 |
| Pontypridd RFC | 22 | 14 | 2 | 6 | 666 | 478 | +188 | 47 |
| Swansea RFC | 22 | 14 | 1 | 7 | 691 | 509 | +182 | 45 |
| Llanelli RFC | 22 | 13 | 0 | 9 | 748 | 527 | +221 | 38 |
| Ebbw Vale RFC | 22 | 12 | 0 | 10 | 647 | 569 | +78 | 38 |
| Neath RFC | 22 | 11 | 2 | 9 | 664 | 553 | +111 | 35 |
 Edinburgh Reivers | 22 | 10 | 1 | 11 | 564 | 654 | -90 | 34 |
| Bridgend RFC | 22 | 8 | 1 | 13 | 427 | 564 | -137 | 27 |
| Glasgow Caledonians | 22 | 8 | 1 | 13 | 488 | 621 | -133 | 25 |
| Caerphilly RFC | 22 | 2 | 1 | 19 | 427 | 939 | -512 | 6 |
| Dunvant RFC | 22 | 1 | 1 | 20 | 357 | 960 | -603 | 5 |
Results
Round 1
Round 2
Round 3
Round 4
Round 5
Round 6
Round 7
Round 8
Round 9
Round 10
Round 11
Round 12
Round 5 rescheduled match
Round 14
Round 13 rescheduled match
Round 15
Round 14 rescheduled match
Round 16
Round 13 rescheduled match
Round 15 rescheduled match
Round 17
Round 15 rescheduled matches
Round 10 rescheduled match
Round 18
Round 15 rescheduled match
Round 19
Round 20
Round 14 rescheduled match
Round 21
Round 15 rescheduled match
Round 22
Round 21 rescheduled match
