Previous reports from the Baltimore Sun's Aaron Wilson said he'd be surprised if Smith played at all Sunday.
Other probables include tight end
Smith, who was held out of Week 14's game aganist the Dolphins, has been dealing with knee swelling over the past two weeks.
Taliaferro saw his first carries in three weeks against Miami when he had seven carries for 35 yards and one catch for 20.
The Ravens face the Jaguars in Week 15.
"If you look at it, no one has many carries besides Justin [Forsett]," Harbaugh told the Baltimore Sun. "You'll see Lorenzo, without question. There's no punishment going on there. I just think it's been Justin has been playing so well, but Lorenzo has to be there for us, especially down the stretch here."
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