NFL Nation: Terrence Frederick

With right guard David DeCastro out indefinitely, there will be minimal impact felt from the Steelers' 2012 draft class this season. DeCastro, the team's first-round pick, was the only guaranteed starter from Pittsburgh's most recent draft.

Offensive tackle Mike Adams, the second-round pick, is in the running for the starting left tackle job. But it wasn't an encouraging sign when the Steelers started Max Starks at left tackle Saturday night.

The player from this draft class who has the best chance of changing games is running back Chris Rainey, a fifth-round pick. He's displayed electric speed this preseason, scoring on a 41-yard run and a 57-yard catch.

Inside linebacker Sean Spence (third round) will be a key contributor on special teams and could see time on the starting defense if there is an injury to Lawrence Timmons or Larry Foote. Nose tackle Alameda Ta'amu (fourth round) has struggled at times and likely will be among the team's inactives every week. Pittsburgh's four seventh-round picks (wide receiver Toney Clemons, tight end David Paulson, cornerback Terrence Frederick and guard Kelvin Beachum) are long shots to make the team.

This isn't to say there won't be a rookie starting for the Steelers this year. Will Johnson, who was out of football last year, is expected to be the Steelers' starting fullback, and Drew Butler, an undrafted rookie, has punted well enough to earn a spot. But the Steelers have to determine whether they'll go with Butler or Jeremy Kapinos, who still hasn't punted this preseason because of issues with his back.

The Steelers had only one rookie starter from the 2011 draft class (right tackle Marcus Gilbert) and one in 2010 (center Maurkice Pouncey).
The draft is over. Book it and now grade it. On a side note, I had Rokevious Watkins as my mock draft Mr. Irrelevant, but hey what do I know. (This is only a joke, I swear). Here's a recap of the final two rounds of the draft:

BENGALS: It was a quiet end to the draft for the Bengals, who had one pick in the final two rounds. Cincinnati used it on Ohio State RB Dan "Boom" Herron (sixth round), a physical back who lacks breakaway speed. You would expect a back to be physical with the nickname "Boom."

BROWNS: ILB Emmanuel Acho (sixth round) was Texas' leading tackler last season, but he has average range. ... Boise State DT Billy Winn (sixth round) is a flashy but inconsistent interior player. ... Arizona CB Trevin Wade (seventh round) is a finesse cover man who has good ball skills. ... Alabama FB-TE Brad Smelley (seventh round) is a hybrid player on offense but he will need to contribute on special teams to stick around.

RAVENS: WR Tommy Streeter (sixth round) is a tall (6 feet 5), raw prospect out of Miami who caught 46 passes last year after making a total of six the previous two seasons. ... Georgia DT DeAngelo Tyson (seventh round) isn't a flashy player and he projects to be a backup nose tackle.

STEELERS: WR Toney Clemons (seventh round) from Colorado is a vertical threat who needs to get stronger. ... Oregon TE David Paulson (seventh round) is an overachiever who has steady hands yet lacks speed to get separation. ... Texas A&M CB Terrence Frederick (seventh round) has good instincts and works best in zone coverage. ... SMU G Kelvin Beachum (seventh round) is an aggressive blocker but he has limitations as a pass protector.

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