Pittsburgh Steelers linebacker LaMarr Woodley said Tuesday not to count him out for his team's game Sunday night against the Baltimore Ravens.

"Everybody counting me out ... don't count me out yet. Big game on Sunday," Woodley said in an online video link posted on his Twitter page. Woodley was having his injured hamstring worked on while he was speaking in the short video message.

Woodley was responding to a local media report that he would miss Sunday's game with his hamstring injury. The Pittsburgh Post-Gazette, citing a team source, reported that Woodley's hamstring injury is "not good" and he will miss Sunday night's game vs. Baltimore and likely the next game against the Cincinnati Bengals. The newspaper reported that he might be able to return after the team's Nov. 20 bye.

Woodley has been on a tear with 7.5 sacks in his past four games, including two against the New England Patriots in Sunday's victory, but he sat out the fourth quarter after injuring the hamstring in the third quarter. He leads the AFC with nine sacks.

Steelers coach Mike Tomlin said Tuesday that Woodley's availability for Sunday's game will depend on his ability to practice this week.

The Steelers also might be without starting linebackers James Harrison and James Farrior versus the Ravens.

Harrison announced on his Twitter account: "Saw the doctor today. Looks like I won't be playing this weekend but at least I'm cleared for practice."

Farrior is expected to miss as much as a month with a calf injury, the Post-Gazette has reported.

Steelers coach Mike Tomlin confirmed Tuesday that Harrison has been cleared to practice.

"He has been cleared to practice and that is where we are," Tomlin said Tuesday, according to the team's website. "We will reevaluate the situation at some point later in the week and let that be our guide in terms of potential participation. But right now I just want to be clear that he has been cleared to practice."

Tomlin said Farrior will practice in a limited capacity Wednesday.

Woodley and Harrison have totaled 82½ sacks since 2008, accounting for half of the Steelers' sacks over that time.

At one point in the fourth quarter of Sunday's win over New England, Lawrence Timmons was the only normal Steelers starting linebacker on the field, and he was playing out of position at outside linebacker as Harrison's replacement.

Pittsburgh survived anyway with reserve linebackers Larry Foote and Chris Carter making plays. Carter filled in for Woodley when he left the game.

The Steelers hope linebacker Jason Worilds returns this week from a quadriceps injury. If Woodley, Farrior and Harrison can't play, Carter, Sylvester and Foote will take on bigger roles. Tomlin also didn't rule out using four defensive linemen.

Receiver Hines Ward will practice this week after missing the Patriots game with an ankle injury. Receiver Emmanuel Sanders, who announced on his Twitter account that his mother died Tuesday morning, will have his left knee evaluated. Both players will be monitored throughout the week. Only guard Doug Legursky, who started the first three games of the season, has officially been ruled out for Sunday.

The Steelers (6-2) can use all the healthy players they can get. The Ravens pummeled them in the season opener, forcing seven turnovers in Baltimore's 35-7 win. The Steelers have won their last four, but Tomlin said the Ravens' defense continues to be "the best in the world."

"They are slaying people and we are a part of that," he said. "They are playing extremely fast, they are really talented, they know what they are doing and they are very rarely out of place. They have uniquely talented people at every level of their defense."

Information from ESPN.com AFC North blogger Jamison Hensley and The Associated Press was used in this report.