Carr, 25, who played for the Tennessee Titans last season, has agreed in principle on a two-year, $5 million contract.
"I'm ecstatic to be here, to say the least," Carr said after spending an hour at Ravens headquarters yesterday afternoon. "I've always respected the organization and respected the team's style of football. I'm just happy they even considered me to come here."
Carr could compete to be the team's third cornerback behind Fabian Washington and Domonique Foxworth.
He should also upgrade the Ravens' return game, which ranked 19th in punt returns and next-to-last in kickoff returns last season. With the Titans, Carr was fourth in the NFL on kickoff returns (28.1-yard average) and 12th on punt returns (10.1).
The Ravens didn't make an official announcement on cornerback Samari Rolle, whose exit physical lasted into the evening. He will likely be released today.
Note: : The Ravens and Orioles are teaming up for a unique doubleheader. On April 25, the Ravens will hold their 12th Spring Football Festival at M&T; Bank Stadium from 3 p.m. to 7 p.m. The event consists of interactive on-field activities, a locker room tour, player autograph sessions and watching the 2009 NFL Draft live on SmartVision and TVs throughout the stadium. After the football activities, the Orioles will host the Texas Rangers at Oriole Park for a 7:05 p.m. game. By purchasing the packaged ticket, fans will be admitted into the baseball game.