Unit Grades

SI.com's NFL personnel expert Michael Lombardi evaluates the Steelers' units.

QB B+
Byron Leftwich provides quality veteran backup.

RB B+
Rookie Rashard Mendenhall adds a dimension.

WR B-
Need to keep Holmes healthy and get rookie Limas Sweed ready.

TE B
Miller is the latest standard-bearer for an always strong unit.

OL C
The team's Achilles heel; failed to protect Roethlisberger in '07.

DL A
Remains one of league's toughest clubs to run against.

LB A
Have some very good rushers and excellent speed.

DB B
Playmakers at all positions; best when the rush is going well.

ST B
From kicking game through coverage units, solid all around.