Liverpool have not scored a single goal in the second-half of a Premier League game this season, with the 37th minute being their latest strike so far.
Rodgers, whose team take on Sunderland on Sunday, says the statistic is not a cause for concern.
"It is well documented we haven't scored a goal (in the second half) and sometimes that trend surprises you when you hear that," he said.
"Probably in some of the games in the second half we have sat a bit deeper and have seen out the results, but Swansea we didn't.
"It doesn't concern me. It is something we will work on.
"As the game (the 1-0 Capital One Cup defeat at Manchester United) went on the other night, I thought we were going to get that goal, but I can't say I'm overly concerned."
Rodgers is certain, however, it is not a fitness issue.
"We have obviously had players who have come back and were gaining fitness," he said.
"Overall, the condition the team is in is very good. Sometimes it (not scoring) is just how it rolls out in the early part of the season, and for us we just need to keep working."
Rodgers' men face Sunderland on Sunday, live on Sky Sports, and he says the sacking of Paolo di Canio has come at the wrong time for Liverpool.
"There is an upturn, you normally find, when a manager comes in," he said.
"It is unfortunate Paolo lost his job. They had a victory in the week (in the Capital One Cup) and obviously Kevin Ball (caretaker boss) will go into the game looking for the players to put on a performance again.
"We know the capabilities of Sunderland and I am sure they will come out fighting for a result.
"For us, in order to continue climbing, we are determined to go and win."