Fullback
Player Age Opposition Ground Date Match
DH Bowen 18y 226d v England Swansea 16 Dec 1882 Details
BL Jones 18y 285d v England Twickenham 21 Jan 1950 Details
KS Jarrett 18y 332d v England Cardiff 15 Apr 1967 Details
W Bancroft 18y 336d v Scotland Cardiff 1 Feb 1890 Details
TM Barlow 19y 161d v Ireland Cardiff 12 Apr 1884 Details
TG Price 19y 184d v England Cardiff 16 Jan 1965 Details
JPR Williams 19y 336d v Scotland Murrayfield 1 Feb 1969 Details
TK Coslett 20y 6d v England Twickenham 20 Jan 1962 Details
GR Williams 20y 38d v Ireland Lansdowne Road 1 Apr 2000 Details
JA Gould 20y 85d v England Swansea 3 Jan 1885 Details

Wing
Player Age Opposition Ground Date Match
TWJ Prydie 18y 25d v Italy Millennium Stadium 20 Mar 2010 Details
DW Howells 18y 78d v Japan Osaka 8 Jun 2013 Details
NW Biggs 18y 119d v Ireland Swansea 2 Mar 1889 Details
GP North 18y 214d v South Africa Millennium Stadium 13 Nov 2010 Details
TW Pearson 18y 238d v England Newport 3 Jan 1891 Details
DPM Lloyd 19y 27d v Scotland Cardiff 1 Feb 1890 Details
HR Robinson 19y 47d v Barbarians Millennium Stadium 2 Jun 2012 Details
HB Amos 19y 59d v Tonga Millennium Stadium 22 Nov 2013 Details
TJ Brewer 19y 158d v England Twickenham 21 Jan 1950 Details
A Hickman 19y 165d v England Cardiff 18 Jan 1930 Details

Centre
Player Age Opposition Ground Date Match
NW Biggs 18y 49d v NZ Natives Swansea 22 Dec 1888 Details
E Williams 18y 213d v England Twickenham 17 Jan 1925 Details
BL Jones 18y 334d v Ireland Belfast 11 Mar 1950 Details
WG Stewart-Morgan 19y 62d v France Swansea 26 Feb 1927 Details
WTH Davies 19y 204d v Ireland Cardiff 14 Mar 1936 Details
KS Jarrett 19y 247d v England Twickenham 20 Jan 1968 Details
JA Devereux 19y 294d v England Twickenham 18 Jan 1986 Details
DL Thomas 19y 316d v Ireland Cardiff 11 Mar 1961 Details
LB Davies 19y 330d v Italy Cardiff 16 Jan 1996 Details
T Morgan 19y 331d v Ireland Millennium Stadium 8 Aug 2015 Details

Fly-half
Player Age Opposition Ground Date Match
FL Williams 19y 7d v Scotland Swansea 2 Feb 1929 Details
GL Lloyd 19y 17d v Ireland Lansdowne Road 14 Mar 1896 Details
WH Lewis 19y 122d v Ireland Swansea 13 Mar 1926 Details
G Davies 19y 161d v Scotland Murrayfield 1 Feb 1947 Details
NR Jenkins 19y 195d v England Cardiff 19 Jan 1991 Details
DR Biggar 19y 226d v Canada Toronto 30 May 2009 Details
GL Henson 19y 230d v Romania Millennium Stadium 19 Sep 2001 Details
RR Morris 19y 236d v Scotland Swansea 4 Feb 1933 Details
WC Jones 19y 314d v England Cardiff 20 Jan 1934 Details
W Roberts 19y 334d v England Twickenham 19 Jan 1929 Details

Scrum-half
Player Age Opposition Ground Date Match
H Tanner 18y 346d v New Zealand Cardiff 21 Dec 1935 Details
GO Edwards 19y 263d v France Colombes 1 Apr 1967 Details
RN Jones 20y 100d v England Twickenham 18 Jan 1986 Details
DJ Peel 20y 281d v South Africa Bloemfontein 8 Jun 2002 Details
DEA Roberts 20y 360d v England Cardiff 18 Jan 1930 Details
WM Phillips 20y 363d v Romania Wrexham 27 Aug 2003 Details
TD Knoyle 21y 79d v Argentina Millennium Stadium 20 Aug 2011 Details
TD Holmes 21y 99d v Australia Sydney 17 Jun 1978 Details
WJ Delahay 21y 141d v England Cardiff 21 Jan 1922 Details
WC Powell 21y 146d v Ireland Swansea 13 Mar 1926 Details

Prop
Player Age Opposition Ground Date Match
DS Parker 19y 213d v Ireland Cardiff 8 Mar 1924 Details
D Young 19y 317d v England Brisbane 8 Jun 1987 Details
EL Jones 19y 352d v France Colombes 21 Apr 1930 Details
DH Stephens 20y 52d v England Twickenham 20 Jan 1912 Details
RP Jones 20y 162d v Barbarians Millennium Stadium 2 Jun 2012 Details
ME Davis 20y 307d v Australia Brisbane 22 Jul 1991 Details
DJ Thomas 20y 343d v Ireland Swansea 8 Mar 1930 Details
LM Brown 21y 23d v Georgia Millennium Stadium 18 Nov 2017 Details
J Birch 21y 36d v Scotland Inverleith 4 Feb 1911 Details
P James 21y 106d v Romania Wrexham 27 Aug 2003 Details

Hooker
Player Age Opposition Ground Date Match
DS Parker 20y 113d v New Zealand Swansea 29 Nov 1924 Details
NR Gale 20y 232d v Ireland Lansdowne Road 12 Mar 1960 Details
H Bennett 21y 8d v Argentina Buenos Aires 19 Jun 2004 Details
HC Day 21y 269d v Scotland Murrayfield 1 Feb 1930 Details
JR Evans 22y 130d v England Cardiff 20 Jan 1934 Details
RE Blakemore 22y 139d v England Cardiff 18 Jan 1947 Details
RJ Elias 22y 167d v Samoa Apia 23 Jun 2017 Details
BH Williams 22y 263d v France Cardiff 25 Sep 1996 Details
AEH Lamerton 22y 296d v France Parc des Princes 20 Mar 1993 Details
TR Thomas 23y 49d v Canada Toronto 11 Jun 2005 Details

Lock
Player Age Opposition Ground Date Match
EV Watkins 19y 294d v New Zealand Cardiff 21 Dec 1935 Details
RC Herrera 20y 22d v Scotland Swansea 7 Feb 1925 Details
A Evans 20y 62d v England Swansea 19 Jan 1924 Details
GO Llewellyn 20y 250d v New Zealand Cardiff 4 Nov 1989 Details
G Parsons 20y 272d v England Cardiff 18 Jan 1947 Details
DJ Thomas 20y 308d v Scotland Murrayfield 1 Feb 1930 Details
T Arthur 21y 26d v Scotland Cardiff 5 Feb 1927 Details
HJ Sturgess 21y 28d v England Twickenham 19 Jan 1929 Details
SC Davies 21y 30d v Tonga Auckland 16 Jun 2017 Details
TW Shaw 21y 95d v Romania Bucharest 12 Nov 1983 Details

Flanker
Player Age Opposition Ground Date Match
NH Fender 19y 187d v Ireland Swansea 8 Mar 1930 Details
RE Webster 19y 344d v Australia Rotorua 18 Jun 1987 Details
H Peacock 19y 354d v Scotland Swansea 2 Feb 1929 Details
JL Morgan 20y 52d v South Africa Cardiff 14 Dec 1912 Details
RCC Thomas 20y 57d v France Colombes 26 Mar 1949 Details
AM Lloyd 20y 62d v Japan Osaka 10 Jun 2001 Details
JC Quinnell 20y 125d v Fiji Cardiff 11 Nov 1995 Details
JJ Thomas 20y 169d v Australia Sydney 14 Jun 2003 Details
AW Jones 20y 265d v Argentina Puerto Madryn 11 Jun 2006 Details
TT Faletau 20y 343d v Australia Auckland 21 Oct 2011 Details

No. 8
Player Age Opposition Ground Date Match
JF Thompson 20y 29d v England Twickenham 20 Jan 1923 Details
TT Faletau 20y 204d v Barbarians Millennium Stadium 4 Jun 2011 Details
JJ Thomas 20y 317d v England Brisbane 9 Nov 2003 Details
EV Watkins 20y 341d v Scotland Swansea 6 Feb 1937 Details
RJ Robins 20y 352d v Scotland Murrayfield 7 Feb 1953 Details
WG Thomas 20y 364d v England Twickenham 15 Jan 1927 Details
ME Williams 21y 24d v France Cardiff 25 Sep 1996 Details
J Lang 21y 140d v France Swansea 28 Feb 1931 Details
D Nash 21y 141d v South Africa Cardiff 3 Dec 1960 Details
LS Quinnell 21y 148d v Scotland Cardiff 15 Jan 1994 Details

Substitute (excluding unused substitute)
Player Pos Age Opposition Ground Date Match
DW Howells (FB) 18y 85d v Japan Tokyo 15 Jun 2013 Details
DR Biggar (FH) 19y 29d v Canada Millennium Stadium 14 Nov 2008 Details
GL Henson (UB) 19y 129d v Japan Osaka 10 Jun 2001 Details
GP North (W) 19y 166d v Namibia New Plymouth 26 Sep 2011 Details
RE Donovan (FB) 19y 242d v France Parc des Princes 19 Mar 1983 Details
DJ Peel (SH) 19y 290d v Japan Tokyo 17 Jun 2001 Details
TD Knoyle (C) 20y 17d v New Zealand Dunedin 19 Jun 2010 Details
MR Patchell (FH) 20y 22d v Japan Osaka 8 Jun 2013 Details
H Bennett (H) 20y 66d v Ireland Lansdowne Road 16 Aug 2003 Details
IL Evans (FH) 20y 83d v France Cardiff 4 Sep 1991 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 Ireland at Millennium Stadium, 1st Test, Aug 31, 2019 [0-0]
Wales v England at Millennium Stadium, 2nd Test, Aug 17, 2019 [0-0]
Wales v Ireland at Millennium Stadium, Six Nations, Mar 16, 2019 [0-0]