Harbaugh also said Sunday that placing Pitta on injured reserve with a designated-to-return tag isn't possible because there's too much damage in the hip, according to The Baltimore Sun.
NFL.com's Ian Rapoport reported that doctors successfully extracted the bone fragments from Pitta's fractured and dislocated hip during a Saturday night surgery, according to a person briefed on the injury.
"Asking for prayers for a speedy recovery and heal time as I go through this ordeal," Pitta wrote on Facebook.
More tests are scheduled this week to determine damage to the surrounding area, Rapoport reported, and Harbaugh said Sunday the team is waiting for those results to gauge the full extent of Pitta's injury and determine a specific time frame for his return.
As for Pitta, uncertainty reigns. He signed a one-year contract in May, hoping to leverage the 2013 season into a lucrative long-term deal. Contract leverage now is the least of Pitta's concerns.