Ward was in the Rams squad for the first time against Charlton on Saturday since suffering a hamstring strain in September.
The Northern Ireland forward came off the bench in the 68th minute at The Valley and four minutes later scored the penalty that earned Nigel Clough's side a 1-1 draw.
However, it proved to be just a brief cameo appearance as Ward was himself substituted after 83 minutes as a precautionary measure after complaining of tightness in his hamstring.
Mark O'Brien was only fit enough for the bench after a groin injury forced him off towards the end of the Boxing Day defeat at Burnley so he could start.
Midfielder Craig Bryson has been playing despite a knee problem and he was given the afternoon off in south east London. Clough will decide whether to bring the Scot back into the squad against Boro.