His next appearance in an Ulster shirt that season was not even in the white of the senior team but the black shirts of the Ulster A team in the 24–19 defeat to Leinster A where Wallace played Inside Centre. He would continue to play for Ballymena before being once again drafted into the Ulster 22 for the Heineken Cup fixture away to Treviso where he came off the bench to score a try in the 43–26 bonus point win. After this cameo performance he would go on to sit on the bench for Ireland A in the 20–12 away defeat to France A, where he came on, and the 33–18 victory over England A at Kingsholm.