Steelers' needs on defense

They are leaning toward Darrelle Revis or Paul Posluszny.
PITTSBURGH (AP) -- For a team that professes the NFL draft should be about acquiring talent rather than filling needs, the Pittsburgh Steelers certainly have been predictable lately in the early rounds.
A receiver, or a defensive back. A defensive back, or a receiver.
Of their top 15 picks in the last eight drafts -- they dealt away their second-round pick last year -- the Steelers have chosen five receivers and four defensive backs. During that period, five of their first-rounders were receivers, cornerbacks or safeties.
Despite all this stockpiling at only a couple of positions, the Steelers go into this weekend's draft under new coach Mike Tomlin with a familiar but longer-than-usual list of needs. Yes, wide receiver and cornerback are among them, as are a pass-rushing defensive lineman or linebacker and an offensive lineman.
"We could use help at any level of our defense," director of football operations Kevin Colbert said.
It's much different from a year ago when, with coach Bill Cowher still in control only 21/2 months after winning a Super Bowl, the Steelers had few visible needs going into a draft that yielded wide receiver Santonio Holmes in the first round and, at least so far, not much else.
By contrast, the Steelers now are a fast-aging team coming off an 8-8 season that exposed a lack of depth in some areas once perceived as strengths.
They've also had more significant departures (linebacker Joey Porter was released, center Jeff Hartings retired) than additions (offensive lineman Sean Mahan) to date during the offseason.
Unpredictable draft
As a result, this might be the most unpredictable Steelers draft in years, especially with the team scheduled to draft higher in the first round (No. 15) than it has in all but one year since 2001.
Players who may be available when the Steelers choose in the first round, unless they elect to deal down, are Pitt cornerback Darrelle Revis and Penn State linebacker Paul Posluszny -- both of whom are from nearby Aliquippa -- Florida State linebacker Lawrence Timmons, Nebraska defensive end Adam Carriker and Arkansas defensive end Jamaal Anderson.
With starters such as safety Troy Polamalu, left guard Alan Faneca and right guard Kendall Simmons entering the final year of their contracts and nine picks available unless they trade, the Steelers need to find usable players throughout the draft. Certainly more than they did last year, when only one of their final five picks stayed around.
Colbert says this is the strongest draft he can remember for receivers (unlike last year, when Holmes was the only wide receiver to go in the first round) but is only average for offensive linemen and running backs.
Defensively, he considers it strong across the board.
"I think that's something that's interesting to us," said Colbert, who has drafted a defensive player in the first round only twice (Polamalu in 2003 and nose tackle Casey Hampton in 2001) since being hired in 2000.
Changing defense
Some in the NFL are viewing this draft as a sign of how quickly the Steelers will shift from the 3-4 defense they've played since 1983 to the 4-3 Tomlin has long preferred. To Colbert and Tomlin, though, that's not necessarily so.
"In a given system that we've had here for so many years, you knew a certain type of player fit better than another," Colbert said.
"But you don't want to lock into a specific need. Coach (Tomlin) says talent defies scheme and, if you lock yourself in and say he can't help us, then maybe we've made a mistake."
Tomlin agrees, saying, "Really, in today's NFL, the lines are getting blurry, specifically if you're talking about the 3-4 opposed to the 4-3."
One pick the Steelers seem certain to make is a big running back to complement Willie Parker, much like Jerome Bettis did two years ago.
The Steelers re-signed running back Najeh Davenport, but he had only 221 yards rushing last season, and they told Parker last week they will add another runner. Louisville's Michael Bush is a possibility in the second round.
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