OWINGS MILLS, Md. -- Baltimore Ravens coach John Harbaugh reiterated that first-round pick Breshad Perriman didn't sustain a new injury, saying the rookie wide receiver has been dealing with a strained posterior cruciate ligament since injuring his right knee 67 days ago.
"It's just a slow-healing deal," Harbaugh said Monday. "He's had probably one of the all-time slowest healing sprained PCLs ever. That's nothing against him. It's just the way it is. It's tough. It's one-in-some number, whatever Dr. [James] Andrews said it was."
The loss of Perriman has been underscored this week after Steve Smith injured his back and Michael Campanaro was placed on injured reserve with a herniated disk. The Ravens traded a seventh-round pick for speedy wide receiver Chris Givens on Saturday.
Perriman, the No. 26 overall pick, hurt his knee when he fell on it while making a catch on the first day of training camp. It was initially announced as a bruised knee, but it was later revealed to be a sprained ligament. He was sidelined for eight weeks before practicing on a limited basis for a couple of days.
During pregame warm-ups for the Sept. 27 game against the Cincinnati Bengals, Perriman was running close to full speed until he pulled up while trying to chase down a deep throw. He limped afterward and didn't run another route.
Last week, Harbaugh said he was unaware of a setback.
"I don't know to what degree that was different from any other workout," Harbaugh said. "There is always a little bit of strain and soreness and soreness when you push it a little bit. But there was no new injury there."
Perriman underwent arthroscopic surgery on his knee last week and he also received an injection of stem cells.
"Hopefully that will make a good impact on it," Harbaugh said. "We'll see how he comes along this week. I'm looking forward to it, seeing how fast that we can get some recovery going on it."
This is the first time in the Ravens' 20-year history that a first-round pick has missed the first four games of his rookie season.