The 25-year-old marked his second Reserve outing with a goal, but he has yet to play competitively for the first team since his £5.8million summer transfer from Manchester City after breaking a metatarsal in a pre-season friendly.
The road to recovery has been long and hard but he managed 65 minutes for the second string, following up his 45 minutes for the reserves against City last week.
He opened the scoring after 19 minutes, volleying home from close range, before Frank Wiafe Danquah and a deflected Matty Pattison strike put the hosts further ahead at half-time.
Barton Over Another Hurdle!
Chris McCaughtrie scored Wigan's consolation seven minutes before the final whistle.
Barton was the only experienced player in the Newcastle team and he broke the deadlock after 19 minutes as Wigan failed to clear Jonny Godsmark's right-wing centre, allowing the midfield star to volley home from close range.
Barton was the only experienced player in the Newcastle team and he broke the deadlock after 19 minutes as Wigan failed to clear Jonny Godsmark's right-wing centre, allowing the midfield star to volley home from close range.
The former Man. City man had earlier gone close with a far post strike from Matty Pattison's flag-kick which whistled over goalkeeper Mike Pollitt's crossbar.
NEWCASTLE UTD RESERVES:
Forster, Bertram, Lough, Doninger, Grieve, Morris, LuaLua, Pattison, Wiafe Danquah, Barton (Marwood 65mins), Godsmark. Subs (not used): Wrightson, Patterson, McLaughlin, Henderson.