Greenwood has been sidelined for over a week by what is being called a mid-foot sprain. He did not participate in the team's intrasquad scrimmage on July 29 and did not make the trip to Canton for Monday night's Hall of Fame Game against St. Louis.
Before being injured, Greenwood had impressed coaches and seemed almost a shoo-in to land the starting strongside linebacker job.
In his absence, special teams standout Twan Russell has been lining up with the first team. Veteran Scott Galyon also is hoping to win the starting job, but he has been slowed by a knee problem.