Smith is expected back as soon as Thursday after experiencing general soreness.
The Ravens' leading tackler from last season, Smith practiced Monday night without incident. McClellan, a reserve linebacker, was in and out of the practice, with an irritated heel that's still bothering him.
Meanwhile, starting cornerback Lardarius Webb remains sidelined with a back issue. Tests revealed no structural damage to Webb's back, according to sources. It's believed to be a muscle injury.
Undrafted rookie offensive tackle Parker Graham returned to practice after being out since the start of camp last week with a groin injury.