Stormers lock Ruben van Heerden. Ashley Vlotman/Gallo Images Stormers lock Ruben van Heerden has earned a call-up to the Springbok training squad in Johannesburg. The 28-year-old former Junior Springbok, who has been a key member of the Stormers team that made the URC semi-finals, will replace outgoing franchise team-mate Salmaan Moerat, who has been released from the Bok camp due to injury. Moerat will leave the Stormers for France at the end of the season.