The Ravens secured a trade for the 26-year-old last week in a deal with the Jacksonville Jaguars, but Harbaugh deemed that he wasn't up to speed with the club's playbook to start against the Miami Dolphins.
However, after a full week of practice the head coach believes that he is ready to go against the Packers.
Harbaugh told reporters: "He did a heck of job this week. He looks good.
"We'll anticipate that he'll play quite a bit, and possibly start. And might even say probably start at this point."
The Ravens are 3-2 in their season going into week six.