| Player | Age | Team | Opposition | Ground | Date | Match | |
|---|---|---|---|---|---|---|---|
| DH Bowen | 18y 226d | Wales | v England | Swansea | 16 Dec 1882 | Details | |
| BL Jones | 18y 299d | Wales | v Scotland | Swansea | 4 Feb 1950 | Details | |
| KS Jarrett | 18y 332d | Wales | v England | Cardiff | 15 Apr 1967 | Details | |
| W Bancroft | 18y 336d | Wales | v Scotland | Cardiff | 1 Feb 1890 | Details | |
| TJ Davies | 19y 115d | Wales | v England | Cardiff | 17 Jan 1953 | Details | |
| H Martin | 19y 186d | France | v Wales | Cardiff | 2 Mar 1908 | Details | |
| TG Price | 19y 184d | Wales | v England | Cardiff | 16 Jan 1965 | Details | |
| TGP Curley | 19y 212d | Australia | v Wales | Cardiff | 4 Jan 1958 | Details | |
| G Nepia | 19y 218d | New Zealand | v Wales | Swansea | 29 Nov 1924 | Details | |
| SJ Joubert | 19y 237d | South Africa | v Wales | Swansea | 1 Dec 1906 | Details |
| Player | Age | Team | Opposition | Ground | Date | Match | |
|---|---|---|---|---|---|---|---|
| TWJ Prydie | 18y 25d | Wales | v Italy | Millennium Stadium | 20 Mar 2010 | Details | |
| NW Biggs | 18y 119d | Wales | v Ireland | Swansea | 2 Mar 1889 | Details | |
| A Domec | 18y 139d | France | v Wales | Cardiff | 23 Feb 1929 | Details | |
| L Augras-Fabre | 18y 199d | France | v Wales | Swansea | 28 Feb 1931 | Details | |
| GP North | 18y 214d | Wales | v South Africa | Millennium Stadium | 13 Nov 2010 | Details | |
| TW Pearson | 18y 238d | Wales | v England | Newport | 3 Jan 1891 | Details | |
| KC Fyfe | 18y 296d | Scotland | v Wales | Swansea | 4 Feb 1933 | Details | |
| JH Gage | 18y 345d | Ireland | v Wales | Swansea | 13 Mar 1926 | Details | |
| TR Hewitt | 18y 362d | Ireland | v Wales | Cardiff | 8 Mar 1924 | Details | |
| DPM Lloyd | 19y 27d | Wales | v Scotland | Cardiff | 1 Feb 1890 | Details |
| Player | Age | Team | Opposition | Ground | Date | Match | |
|---|---|---|---|---|---|---|---|
| KG Macleod | 18y 1d | Scotland | v Wales | Cardiff | 3 Feb 1906 | Details | |
| NW Biggs | 18y 49d | Wales | v NZ Natives | Swansea | 22 Dec 1888 | Details | |
| AH Bailey | 18y 68d | Ireland | v Wales | Swansea | 10 Mar 1934 | Details | |
| A Cameron | 18y 228d | Scotland | v Wales | Cardiff | 7 Feb 1948 | Details | |
| E Williams | 18y 234d | Wales | v Scotland | Swansea | 7 Feb 1925 | Details | |
| AJFK O'Reilly | 18y 309d | Ireland | v Wales | Cardiff | 12 Mar 1955 | Details | |
| BL Jones | 18y 348d | Wales | v France | Cardiff | 25 Mar 1950 | Details | |
| MJM Tait | 18y 365d | England | v Wales | Millennium Stadium | 5 Feb 2005 | Details | |
| AR McKibbin | 19y 2d | Ireland | v Wales | Cardiff | 15 Jan 1977 | Details | |
| M Bergamasco | 19y 7d | Italy | v Wales | Millennium Stadium | 2 Mar 2002 | Details |
| Player | Age | Team | Opposition | Ground | Date | Match | |
|---|---|---|---|---|---|---|---|
| FS Hewitt | 17y 157d | Ireland | v Wales | Cardiff | 8 Mar 1924 | Details | |
| FMW Harvey | 18y 189d | Ireland | v Wales | Cardiff | 9 Mar 1907 | Details | |
| FL Williams | 19y 7d | Wales | v Scotland | Swansea | 2 Feb 1929 | Details | |
| KLT Jackson | 19y 79d | Scotland | v Wales | Swansea | 4 Feb 1933 | Details | |
| WH Lewis | 19y 122d | Wales | v Ireland | Swansea | 13 Mar 1926 | Details | |
| HCC Laird | 19y 140d | England | v Wales | Swansea | 21 Jan 1928 | Details | |
| NR Jenkins | 19y 195d | Wales | v England | Cardiff | 19 Jan 1991 | Details | |
| RA Lloyd | 19y 219d | Ireland | v Wales | Cardiff | 11 Mar 1911 | Details | |
| GL Henson | 19y 230d | Wales | v Romania | Millennium Stadium | 19 Sep 2001 | Details | |
| RR Morris | 19y 236d | Wales | v Scotland | Swansea | 4 Feb 1933 | Details |
| Player | Age | Team | Opposition | Ground | Date | Match | |
|---|---|---|---|---|---|---|---|
| H Tanner | 18y 346d | Wales | v New Zealand | Cardiff | 21 Dec 1935 | Details | |
| GO Edwards | 19y 277d | Wales | v England | Cardiff | 15 Apr 1967 | Details | |
| RN Jones | 20y 83d | Wales | v Scotland | Cardiff | 1 Feb 1986 | Details | |
| GF Camardon | 20y 289d | Argentina | v Australia | Llanelli | 4 Oct 1991 | Details | |
| SM Tuipulotu | 20y 353d | Tonga | v Wales | Swansea | 16 Nov 1997 | Details | |
| DEA Roberts | 20y 360d | Wales | v England | Cardiff | 18 Jan 1930 | Details | |
| WM Phillips | 20y 363d | Wales | v Romania | Wrexham | 27 Aug 2003 | Details | |
| AD Nicol | 21y 9d | Scotland | v Wales | Cardiff | 21 Mar 1992 | Details | |
| AA Mulligan | 21y 33d | Ireland | v Wales | Cardiff | 9 Mar 1957 | Details | |
| A Troncon | 21y 36d | Italy | v Wales | Cardiff | 12 Oct 1994 | Details |
| Player | Age | Team | Opposition | Ground | Date | Match | |
|---|---|---|---|---|---|---|---|
| FE Mendez Azpillaga | 19y 63d | Argentina | v Australia | Llanelli | 4 Oct 1991 | Details | |
| DA Kendrew | 19y 180d | England | v Wales | Cardiff | 18 Jan 1930 | Details | |
| DS Parker | 19y 213d | Wales | v Ireland | Cardiff | 8 Mar 1924 | Details | |
| JD Davies | 20y 15d | Wales | v Ireland | Cardiff | 16 Feb 1991 | Details | |
| G Stephens | 20y 66d | Wales | v Scotland | Swansea | 3 Feb 1912 | Details | |
| G Coscolla | 20y 70d | France | v Wales | Cardiff | 26 Feb 1921 | Details | |
| D Young | 20y 104d | Wales | v USA | Cardiff | 7 Nov 1987 | Details | |
| DM Bain | 20y 146d | Scotland | v Wales | Swansea | 3 Feb 1912 | Details | |
| RP Jones | 20y 162d | Wales | v Barbarians | Millennium Stadium | 2 Jun 2012 | Details | |
| P Guillemin | 20y 171d | France | v Wales | Cardiff | 2 Mar 1908 | Details |
| Player | Age | Team | Opposition | Ground | Date | Match | |
|---|---|---|---|---|---|---|---|
| DS Parker | 20y 113d | Wales | v New Zealand | Swansea | 29 Nov 1924 | Details | |
| KD Mullen | 20y 123d | Ireland | v Wales | Swansea | 29 Mar 1947 | Details | |
| JC Blackham | 20y 146d | Ireland | v Wales | Swansea | 13 Mar 1909 | Details | |
| RC Hemi | 20y 218d | New Zealand | v Wales | Cardiff | 19 Dec 1953 | Details | |
| B Zebega Suman | 20y 265d | Romania | v Wales | Millennium Stadium | 12 Nov 2004 | Details | |
| P Mauriat | 20y 280d | France | v Wales | Cardiff | 2 Mar 1908 | Details | |
| JCH Ireland | 21y 59d | Scotland | v Wales | Swansea | 7 Feb 1925 | Details | |
| GJ Smith | 21y 120d | Fiji | v Wales | Cardiff | 11 Nov 1995 | Details | |
| NA Labuschagne | 21y 236d | England | v Wales | Cardiff | 17 Jan 1953 | Details | |
| M Yachvili | 21y 242d | France | v Wales | Cardiff | 23 Mar 1968 | Details |
| Player | Age | Team | Opposition | Ground | Date | Match | |
|---|---|---|---|---|---|---|---|
| EN Branca | 19y 26d | Argentina | v Wales XV | Cardiff | 16 Oct 1976 | Details | |
| R Desvouges | 19y 112d | France | v Wales | Swansea | 2 Mar 1914 | Details | |
| JM Bannerman | 19y 157d | Scotland | v Wales | Swansea | 5 Feb 1921 | Details | |
| AB Burge | 19y 191d | Australia | v Wales | Cardiff | 12 Dec 1908 | Details | |
| EV Watkins | 19y 294d | Wales | v New Zealand | Cardiff | 21 Dec 1935 | Details | |
| U Latu | 19y 299d | Tonga | v Wales | Swansea | 16 Nov 1997 | Details | |
| R Gemmill | 19y 349d | Scotland | v Wales | Swansea | 4 Feb 1950 | Details | |
| RC Herrera | 20y 22d | Wales | v Scotland | Swansea | 7 Feb 1925 | Details | |
| JR Brady | 20y 27d | Ireland | v Wales | Cardiff | 10 Mar 1951 | Details | |
| LM Stuart | 20y 104d | Scotland | v Wales | Cardiff | 3 Feb 1923 | Details |
| Player | Age | Team | Opposition | Ground | Date | Match | |
|---|---|---|---|---|---|---|---|
| NH Fender | 19y 187d | Wales | v Ireland | Swansea | 8 Mar 1930 | Details | |
| H Peacock | 19y 354d | Wales | v Scotland | Swansea | 2 Feb 1929 | Details | |
| FJ Irarrazaval | 20y 8d | Argentina | v Samoa | Pontypridd | 13 Oct 1991 | Details | |
| JL Morgan | 20y 52d | Wales | v South Africa | Cardiff | 14 Dec 1912 | Details | |
| JMB Scott | 20y 118d | Scotland | v Wales | Swansea | 1 Feb 1908 | Details | |
| JC Quinnell | 20y 125d | Wales | v Fiji | Cardiff | 11 Nov 1995 | Details | |
| F Corodeanu | 20y 157d | Romania | v Wales | Wrexham | 30 Aug 1997 | Details | |
| JJ Thomas | 20y 243d | Wales | v Romania | Wrexham | 27 Aug 2003 | Details | |
| WB Young | 20y 275d | Scotland | v Wales | Swansea | 6 Feb 1937 | Details | |
| AO To'oala Vaeluaga | 20y 286d | Samoa | v Wales | Millennium Stadium | 11 Nov 2000 | Details |
| Player | Age | Team | Opposition | Ground | Date | Match | |
|---|---|---|---|---|---|---|---|
| KG Goodall | 20y 16d | Ireland | v Wales | Cardiff | 11 Mar 1967 | Details | |
| HM Inglis | 20y 183d | Scotland | v Wales | Cardiff | 2 Feb 1952 | Details | |
| TT Faletau | 20y 204d | Wales | v Barbarians | Millennium Stadium | 4 Jun 2011 | Details | |
| AA Shaw | 20y 232d | Australia | v Wales | Cardiff | 10 Nov 1973 | Details | |
| S Tupuola | 20y 261d | Samoa | v Wales | Cardiff | 12 Nov 1988 | Details | |
| EV Watkins | 20y 341d | Wales | v Scotland | Swansea | 6 Feb 1937 | Details | |
| R Capo Ortega | 20y 351d | Uruguay | v Wales A | Cardiff Arms Park | 24 Nov 2001 | Details | |
| WG Thomas | 21y 20d | Wales | v Scotland | Cardiff | 5 Feb 1927 | Details | |
| ME Williams | 21y 24d | Wales | v France | Cardiff | 25 Sep 1996 | Details | |
| PD Howard | 21y 29d | England | v Wales | Cardiff | 18 Jan 1930 | Details |
| Player | Pos | Age | Team | Opposition | Ground | Date | Match | |
|---|---|---|---|---|---|---|---|---|
| DR Biggar | (FH) | 19y 29d | Wales | v Canada | Millennium Stadium | 14 Nov 2008 | Details | |
| VN Ursache | (L) | 19y 92d | Romania | v Wales | Millennium Stadium | 12 Nov 2004 | Details | |
| JD O'Connor | (W) | 19y 146d | Australia | v Wales | Millennium Stadium | 28 Nov 2009 | Details | |
| SW Hogg | (W) | 19y 233d | Scotland | v Wales | Millennium Stadium | 12 Feb 2012 | Details | |
| DJ Peel | (SH) | 20y 19d | Wales | v Romania | Millennium Stadium | 19 Sep 2001 | Details | |
| P Lambie | (FH) | 20y 27d | South Africa | v Wales | Millennium Stadium | 13 Nov 2010 | Details | |
| TI Dimofte | (UB) | 20y 43d | Romania | v Wales | Millennium Stadium | 12 Nov 2004 | Details | |
| H Bennett | (H) | 20y 80d | Wales | v Scotland | Millennium Stadium | 30 Aug 2003 | Details | |
| IL Evans | (FH) | 20y 83d | Wales | v France | Cardiff | 4 Sep 1991 | Details | |
| JM Buttin | (FB) | 20y 92d | France | v Wales | Millennium Stadium | 17 Mar 2012 | Details |
Only the player's first appearance listed; Only includes matches where the player starts in the respective position, and excludes matches as a substitute.
| Records include the following current or recent matches: |
|
Wales v England at Millennium Stadium, Six Nations, Mar 16, 2013 [30-3 FT] |
|
Wales v Ireland at Millennium Stadium, Six Nations, Feb 2, 2013 [22-30 FT] |
|
Wales v Australia at Millennium Stadium, Dec 1, 2012 [12-14 FT] |
