The game against Manchester City on December 26th was the last time Blues had a player booked when both Robbie Savage and Matty Upson got yellow cards.
However, in the last three games against Everton, Blackburn and Tottenham no Blues player has been cautioned.
In fact in all of the last three games that Blues have played in only one player from the opposition has been booked also. Blackburn midfielder Tugay saw yellow in the FA Cup tie at St. Andrews on January 3rd.
I can't remember the last time this happened!!