Pitta suffered the injury on the Ravens’ first offensive drive. He caught a 5-yard pass short of a first down and was hit hard by Steelers safety Ryan Clark and linebacker Lawrence Timmons.
Pitta, who leads the team’s tight ends with 38 catches for 381 yards and three touchdowns, was slow to head to the sideline and was taken to the locker room for immediate evaluation.
He was also examined for a concussion last week during the game against the Oakland Raiders. He later returned to action, showing he had not suffered an injury.
That left the Ravens' secondary depleted considering
“[Secondary Coach] Terryl Austin deserves a lot of credit," Harbaugh said. "He’s done a great job with that group with the injuries."
“I just had to get a feel, kind of testing out my shoulder each play," Ngata said. "It just got more comfortable and better and better.”
Injuries mounted on both sides. Pittsburgh quarterback Byron Leftwich hurt his shoulder on his first-quarter touchdown run and later had his ribs evaluated. Steelers running back Isaac Redman suffered a concussion and was ruled out.