The injured Pitta must be registered on the active roster by December 11, or he will be noted as an injured reserve for the rest of the NFL season.
"We'll go through this week and see how he does," said Harbaugh, according to ESPN.
"If he can play, he will. We want to get him up. That's our goal. It's not 100% certain at this point."
Pitta is thought to be back in light training with the Ravens, although no decision has been made about including the player in the team's roster.