Baltimore Ravens rule out Steve Smith for Week 5

Baltimore Ravens' wide receiver Steve Smith Sr. has been ruled out of the team's Week 5 game against the against the Cleveland Browns on Oct. 11, coach John Harbaugh told Comcast SportsNet on Saturday.

Smith, the team's leading receiver with 29 catches for 373 yards and two touchdowns, has "some small micro fractures in his back," Harbaugh said.

"I think he's going to be OK in the long run," added Harbaugh, who was interviewed at the Michigan-Maryland game where his brother Jim was coaching.

Earlier Saturday, the Ravens released a statement saying Smith's injury wouldn't require surgery, and his status was listed as week-to-week.

The Ravens' only healthy receivers are Kamar Aiken, Marlon Brown, Darren Waller and Chris Givens, who was acquired in a trade with the St. Louis Rams earlier Saturday.

In addition to declaring Smith out, Baltimore also placed wide receiver Michael Campanaro on injured reserve with a herniated disk.

Smith sustained the back injury in the third quarter of the win over the Pittsburgh Steelers on Thursday night, when he was speared in the back by Steelers linebacker Lawrence Timmons. He didn't play in the fourth quarter or overtime.