The Ravens suddenly have a crowd at cornerback, as they welcomed six tryout players to the first day of mandatory minicamp.
Baltimore is looking for more competition for the No. 3 cornerback spot and depth, and Harbaugh said he was "pleased" with what he saw from the veterans in their first practice.
Harbaugh said the Ravens could "absolutely" sign a cornerback by the end of the week.
"Hey, let's kick the tires a little bit and find out what these guys are all about," he said.
"A lot of these guys are proven players that have had injuries the last couple of years. So, we'll see if they're healthy, for one thing. Each one of them has a different story, so let's bring them out here and take a look at them first hand."
Aaron Ross, Drayton Florence, Marquice Cole, Dominique Franks, Bobby Felder and Kevin Thomas were those trying out at cornerback.
Harbaugh said it's difficult to make judgments on each one immediately, but he was impressed.
"They all got through the practice. They are all in shape, which is a credit to those guys," he said.
"You come off the bench, so to speak, and here you are in a fast practice like this. I thought they did a good job. We'll go back and look at that tape really closely tonight, take a look at those guys again tomorrow and see where we are."
A couple of the cornerbacks made plays that stuck out.
Former Atlanta Falcon Franks ran step-for-step with wide receiver Steve Smith Sr. on a deep pass down the sideline and got an offensive pass interference call. Franks later stepped in front of a pass by third-string rookie quarterback Keith Wenning for an interception.
Ross, the former longtime New York Giant, also flashed a few times. Ross deflected one pass away from wide receiver Marlon Brown when he reached around the big-bodied wideout. Ross also ripped a ball away from tight end Owen Daniels, which could have been ruled a fumble.
Ross was limited to just four games last season, but he said he could have returned had he not been placed on injured reserve to save a roster spot. He said his back was healed last year, but hadn't played since Sept. 29.
"If felt great to get the rust off," Ross said. "I've been at home for a while, so it was good to finally get to go against some people instead of going against air. I felt really good."
For players like Ross and Florence, going back to being a tryout player is a far cry from being afull-time starter just three years ago. But their football instincts are taking over.
Florence had one deep pass go over his head for a touchdown to wide receiver Michael Campanaro on what looked to be a miscommunication. He was later flagged for pass interference.
"[The coaches] said I'm going to come in and compete. Best guy stays," Florence said. "That's all you need to hear. It's competition, man. I've been competing for 11 years and that's what I'm used to."
