Wisniewski is being held out of offseason training activities until training camp after undergoing labrum surgery, the Florida Times-Union reports.

That explains why Luke Bowanko was under center during last week's OTAs, and not Wisniewski, who was with Jacksonville offensive coordinator Greg Olson in Oakland in 2013-14.

Wisniewski has agreed to a one-year deal with the Jaguars, the Florida Times-Union reports.

Look for Wisniewski to compete with Luke Bowanko for the Jags' starting center job, with the veteran lineman on track to add experience and versatility (he can also play guard) to the Jags' line, in any case.

The Raiders are "optimistic" C Stefen Wisniewski (knee) will return in Week 8 against the Steelers.

Oakland will still be without LT Menelik Watson (knee), LG Andre Gurode (quad), and RT Tony Pashos (hip), but at least is getting back its triggerman on the interior offensive line. Darren McFadden (hamstring) is also returning at or near 100 percent coming off the Raiders' Week 7 bye to face Pittsburgh.

Raiders C Stefen Wisniewski suffered a sprained knee in Sunday's loss.

"Sprained knee" is an exceedingly broad term, but it sounds like Wisniewski will be out for at least Week 5. That would leave Alex Parsons for center duties against the Chargers. It would be yet another blow to the Raiders' injury-ruined run game.

Stefen Wisniewski (shoulder surgery) will start at center for the Raiders in Week 2.

Wisniewski dressed and backed up in the season opener but has been working his way back from offseason shoulder surgery to repair a torn labrum. Alex Parsons started at center for Oakland in Week 1. Wisniewski's return should help out an offense that mustered up just 45 yards on the ground last week.

Raiders C Stefen Wisniewski (shoulder surgery) is a full participant in camp.

Wisniewski missed the Raiders' entire offseason program as he recovered from his operation, but should be a full-go for the preseason. A second-round pick last season, Wisniewski had a rough year as the Raiders' left guard, but will man his more natural position of center in 2012.

Raiders C Stefen Wisniewski played his entire rookie season with a torn labrum in his shoulder.

Wisniewski is missing OTAs after postseason surgery, though he's expected back at 100 percent for training camp. The 48th pick in the 2011 draft, Wisniewski graded out as a mediocre pass blocker and poor run blocker as a rookie left guard. He's moving back to center -- his natural position -- for the 2012 season.

Coach Dennis Allen revealed that C Stefen Wisniewski underwent a surgical procedure on his shoulder after the season.

There's no word on the severity, though Allen did mention that Li'l Wiz isn't "all the way back." The implication is that the Raiders' new center should be fine by the time training camp rolls around.

Raiders GM Reggie McKenzie confirmed that Stefen Wisniewski is slated for a move to center this season.

Veteran Cooper Carlisle is expected to move to left guard with newcomer Mike Brisiel slotting in at right guard. Wisniewski was rated by most analysts as the top center in last year's draft; the transition should be smooth.

Second-round rookie Stefen Wisniewski appears locked in as the Raiders' starting left guard.

It was thought that Wisniewski would initially play center, but Samson Satele was re-signed to play that role. Although the Raiders lost Robert Gallery in free agency, their power-running scheme is in good shape. Their offensive line looks like: LT Jared Veldheer, LG Wisniewski, C Satele, RG Cooper Carlisle and RT Khalif Barnes.

Rookie C/G Stefen Wisniewski has been so impressive in training camp that coach Hue Jackson plans to find him a starting job, even if it means moving to left guard.

"He's a very tremendous player," said Jackson. "We drafted the right guy. He has all the qualities that we were looking for. He's everything that I thought he would be." Jackson noted that Wisniewski and third-round RT Joseph Barksdale are both "getting it done," so the Raiders could end up with two rookies starting up front.

Raiders agreed to terms with second-round C/G Stefen Wisniewski on a four-year deal.

Wisniewski steps into the midst of controversy as his uncle is the Raiders' assistant offensive line coach. Some draft analysts had an undrafted grade on him, but the Raiders used a second-round pick. Regardless, he'll have a chance to compete with Samson Satele for the starting center gig.