Roberts has seen his career cut short by injury aged just 29.
He has made over 200 league starts for Cardiff, Exeter City, Bristol City and his last club Swindon Town.
Swindon have arrranged a testimonial for Wednesday 25th February, ko 7:05pm at the County Ground against a Chelsea XI. Players such as Gianfranco Zola, Jimmy Floyd Hasselbaink, Gus Poyet, Dennis Wise and Roberto Di Mateo have agreed to play along with several other recognisable Chelsea names. Former City players like Andy Legg, Jason Bowen and Carl Dale are hoped will be in attendance.
The match will also help support Cancer Research.
Tickets cost £12 for adults, £7 for concessions and £1 for the U7's.