We do a lot of organisational work all the time whatever it is, but it hasn't maybe been rewarded with results.Steve Cotterill
The last time that Blues managed the same feat was in the final three games of the 2014/15 Championship campaign when they dispatched Reading, Charlton and Bolton 1-0.
This record will of course be put to a stern test this coming Saturday when Blues welcome Gary Rowett's Derby to St. Andrew's.
The Rams are currently the division's second top scorers with 41 to their name, nine fewer than leaders Wolves.
“Clean sheets don't get beat," said Cotterill.
"It will be a statement we bandy about the dressing room from time to time.
"The clean sheets have been very welcome.”
With Blues having struggled to find goals at the other end of the pitch during this campaign, Cotterill says a lot of work has been going into making the defence as tight as possible.
His cause has of course been helped by being able to put out the same defensive back four in Blues’ last three matches.
"We do a lot of organisational work all the time whatever it is, but it hasn't maybe been rewarded with results," continued the Blues boss.
"What we've got to make sure we do, and we did it very well against Burton, was we defended well when we had the ball.
"There were a couple of times in the first-half where we looked a little bit sloppy and tired in a couple of phases and they jumped us, and we weren't as organised as we were in the second-half.
"I think we're far more organised and we know what we're doing now if we're in certain areas of the field.
"Whether it comes off or not is perhaps whether the luck is with the player or not at the time, or whether he makes exactly the right decision at the time or not.
"But they know pretty much what to do and where and when."