WESTMINSTER, Md. -- Baltimore Ravens starting offensive tackle Adam Terry was carted off the field Tuesday morning at McDaniel College, clutching his leg and screaming in pain after spraining his left ankle.

Terry flipped over running back Ray Rice.

It's not believed to be a season-ending or long-term injury. An MRI exam revealed the sprain, but it initially alarmed the Ravens because Terry had his left ankle surgically repaired in January.

"It's not a major injury," Ravens coach John Harbaugh. "He'll be back."

Terry didn't put any weight on the injured limb and was yelling and pounding his fist into the ground after getting hurt during the contact drill.

Terry is the Ravens' second starting tackle to be hurt seriously in the past four days. He shifted from right tackle to the left side to take over for tackle Jared Gaither, who is out indefinitely with a sprained right ankle and has his leg in an elaborate walking boot.

Former practice squad lineman Mike Kracalik filled in at left tackle for the rest of practice, with third-round pick Oniel Cousins running with the No. 1 offense at right tackle.

"I'm not sure what you can attribute it to, but we're going hard and we want to go hard," center Jason Brown said. "It's a consequence of the game."

After Terry's injury, general manager Ozzie Newsome was on the field making calls on his cell phone after talking with Harbaugh.

The Ravens considered signing former Raiders tackle Barry Sims this summer, but he opted to sign with the 49ers.

Meanwhile, defensive tackle Haloti Ngata confirmed he has a mild sprained medial collateral ligament in his right knee.

"It's just a little minor thing," said Ngata, who is wearing a brace on his leg. "It's just a speed bump that I'm trying to get over. I'll be back sooner than you guys think."

Running back Willis McGahee (left knee) was limited in practice, taking some snaps early and then watching. Nose guard Kelly Gregg returned after experiencing swelling in his left leg Monday. Wide receiver Derrick Mason left the field and had his right knee wrapped, but it's not believed to be serious. Wide receiver Patrick Carter's left arm is in a sling and he's not practicing.

Also not practicing: safety Ed Reed (physically-unable-to-perform-list, undisclosed); running backs P.J. Daniels (cramps) and Cory Ross (arm); fullback Justin Green (undisclosed); wide receiver Demetrius Williams (PUP, leg); tight end Aaron Walker (leg); Gaither, Ngata, tight end Daniel Wilcox (PUP, offseason toe surgery); and cornerback Samari Rolle (bereavement).

Copyright 2008 by The Associated Press