Callum Wilson's failing to score from the penalty spot in the 1-0 win over Stevenage, was the first time a City player has not converted a penalty in League One matches this season.
The Sky Blues have scored six of eight penalties they have been award with Leon Clarke missing the other one in the League Cup First Round tie at Leyton Orient back in August.
City have given away twelve penalties this season but Joe Murphy has saved five of them.