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Giants coach Tom Coughlin, left, and GM Jerry Reese need to figure out who's in the mix at linebacker. (John Munson | The Star-Ledger)

PHOENIX ‐ The Giants linebacking group will have a different look next season. It's hardly a surprise.

Last year's starting weakside linebacker Jacquian Williams remains a free agent. He highly unlikely to return.

At this point, it's not a matter of whether Williams will be replaced. It's a matter of who will be replacing him in the starting lineup.

When asked about the position Wednesday at the NFL Annual Meetings, Giants coach Tom Coughlin specified a pair of free-agent signings as his two main candidates.

"We think [J.T.] Thomas can be a WILL 'backer," Coughlin said. "[Jonathan] Casillas is basically the same kind of guy. Both are excellent special teamers. They'll make contributions in both ways."

Other options include Jameel McClain and Mark Herzlich. Both served as starters at numerous linebacker positions last season.

Giants Free Agency:

Signings and contract details

But Thomas appears to be the favorite on the weakside. Part of that has to do with his performance in a November game against the Giants.

The former Jaguars linebacker had 12 tackles in a come-from-behind victory. He caught the Giants' eyes with his performance.

"As you know, Thomas played very well against us," Coughlin said. "A lot of times, quite frankly, there is no better information when you get looking into free agency than people who have done well against you."

The Giants know what starting middle linebacker Jon Beason can do. They're just hoping he can remain healthy and be the leader of the defense.

If he can, it will allow them to use second-year linebacker Devon Kennard in different ways. How exactly does Coughlin envision new defensive coordinator Steve Spagnuolo utilizing Kennard?

"A lot," Coughlin said. "If Jon comes back and Jon is healthy and can play, then you have Kennard maybe in a stronger position and rushing the passer more, the whole deal that way. That is going to make you better."

And hopefully the Giants linebacker situation will be better. Right now, in late-March, that is the plan.

Jordan Raanan may be reached at jraanan@njadvancemedia.com. Follow him on Twitter @JordanRaanan. Find NJ.com Giants on Facebook.