Welsh middle distance runner Gareth Warburton returns from a six-month drugs ban at Sunday's Welsh Athletics Indoor International in Cardiff.
Warburton, 31, and compatriot Rhys Williams, a former European 400m hurdles champion, were suspended after testing positive for banned substances.
The indoor event gives under-20 athletes the chance to take on rising English talent.
Warburton will run as a guest in the 800m final.
Williams, 31, who received a four-month ban, has said he is targeting qualification for the 2015 World Championships in Beijing.
Record-breaking field para-athlete Aled Sion Davies captains Wales at the National Indoor Athletics Centre.
Wales U20 Team 1
Men; Iori Moore (60m), Jake Dawkins (200m), Thomas Arnold (400m), Nicolas Jones (800m), Jack Gooch (1500m), Kyle Arnold (60mh), Ryan Grimwade (pole vault), Kellen Jones (long jump), Adrian Lawrence (triple jump), Nathan Thomason (shot put), Kristian Jones, Jake Dawkins, Matthew Jones, Thomas Arnold (all 4x200m).
Women: Shannon Malone (60m), Melissa Roberts (200m), Emma Hennessy (400m), Izzy Parry-Jones (800m), Issy Morris (1500m), Amy Leahy (60mh), Brenna Price (long jump), Adele Nicoll (shot put).
Wales U20 Team 2
Men; Callum Davies (60m), Kristian Jones (200m), Matthew Jones (400m), James Salisbury (800m), Gage Francis (long jump), Ozaze Oghado (triple jump), Ben Paris, Cameron Star (both 4x200m).
Women; Katie-Jayne Priest (60m), Amelia Reynolds (200m), Zoe Nash (400m), Naomi Reed (800m), Abigail Bowers (60mh), Chloe Hughes (long jump), Emily Wright, Katie Jayne-Priest, Eve Williams (all 4x200m).