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Raiders coach Tom Cable confirmed that Khalif Barnes was signed to compete at left tackle.

His competition will be Mario Henderson, who Oakland remains high on and could end up on the right side if Barnes wins. Either way, JaMarcus’ blindside protection projects to be shaky again. Barnes’ signing probably rules out the Raiders from using their first-round pick (No. 7) at offensive tackle.

Source: San Francisco Chronicle
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The Chargers are in contract talks with free agent OT Mario Henderson.

Henderson, 27, was out of football last year after reporting to Raiders camp out of shape following the lockout. He’d be worth a kick of the tires.

Source: Michael Gehlken on Twitter
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Free agent OT Mario Henderson posted on his Facebook page that he will be playing for the Chargers in 2012.

The signing hasn’t been reported or confirmed by the team. Henderson can play both tackle spots, and could be a useful swing tackle if he’s in shape. He would have been in the NFL last season if he’d have kept up his conditioning.

Source: North County Times
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Raiders signed third-round OT Mario Henderson to a multi-year contract.

Henderson is a highly athletic but developmental project from Florida State. He probably won’t be any more than a swing tackle in his first season.

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LT Mario Henderson and RT Cornell Green opened minicamp as starters on the Raiders first-team offense.

Free agent signing Khalif Barnes is expected to compete for a starting role, but for now is behind Henderson, who was solid in the closing weeks of the ’08 season. Erik Pears is set to backup Green on the other side. C Samson Satele remains out of action following shoulder surgery.

Source: San Francisco Chronicle
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Mario Henderson will open training camp as the Raiders starting left tackle.

Henderson improved throughout last season and was solid down the stretch. Ex-Jaguar starter Khalif Barnes is around for insurance if Henderson struggles in preseason action.

Source: Oakland Tribune
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Agent Drew Rosenhaus revealed on his Twitter page that Raiders LT Mario Henderson has signed with Rosenhaus Sports.

Henderson, penciled in as the Raiders’ starting left tackle ahead of Khalif Barnes, has two years remaining on his rookie deal. He’ll surely angle for a contract extension next offseason if he keeps the position all year.

Source: Drew Rosenhaus on Twitter
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Raiders starting left tackle Mario Henderson is impressing at Raiders camp.

That’s good news for JaMarcus Russell and Jeff Garcia, as Henderson will be protecting their blind side. Henderson shut down pass rushers like Mario Williams and Richard Seymour in December last season and is building off it.

Source: San Francisco Chronicle
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Raiders backup OT Mario Henderson has taken all of the practice snaps at left tackle while Kwame Harris tries to recover from a knee injury suffered in Monday’s game.

Henderson has been overwhelmed since coming into the league and is coming off a lousy preseason. JaMarcus Russell owners should note that Henderson could be protecting Russell’s blindside at Arrowhead Stadium Sunday if Harris’ condition doesn’t improve.

Source: Oakland Tribune
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Kwame Harris (knee) did not practice Friday, so Mario Henderson is expected to start at left tackle for the Raiders on Sunday.

Chiefs RE Tamba Hali’s matchup couldn’t be better. He had six tackles and a breakup in the opener and will be a fine bet to notch his first sack in Week 2.

Source: Sacramento Bee
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