The Giants will have plenty of cap room this offseason, and odds are they’ll use a large portion of it filling their major holes on the roster.

Namely on the offensive line and all over the defense.

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There are avenues to creating even more cap space, though, that general manager Dave Gettleman likely will — or at least, should — explore.

As the offseason gets underway, where do the Giants stand in terms of salary cap space? Who might they release or trade in the coming weeks leading into free agency on March 18? Will they re-sign anyone before free agency kicks off that day?

Here’s a full breakdown of where they stand ... (all cap figures according to Over the Cap unless otherwise mentioned)

Of note: With the CBA expiring, there are no post-June 1 designations for trades or releases this year, which has been a most cost-saving measure in the past.

GIANTS ESTIMATED 2020 CAP PROJECTIONS

NFL’s projected 2020 salary cap:

Giants projected cap space: $61.88 million

Dead cap penalties (per Spotrac): $4.01 million (incl. $3.5 million from Janoris Jenkins, $350,000 from Kyle Lauletta)

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POTENTIAL CAP CASUALTIES/TRADE CANDIDATES

- LB ALEC OGLETREE

2020 cap hit: $11.75 million

Savings if cut/traded: $8.25 million saved, $3.5 million dead cap penalty

Verdict: He’s the most obvious cap casualty on the roster, unless he agrees to restructure his contract to significantly reduce the cap hit. That’s unlikely to happen. Acquiring Ogletree from the Rams was one of Gettleman’s more notable failures. It’s time to move on, and the Giants should be looking to revamp the linebacker group anyway.

- T NATE SOLDER

2020 cap hit: $19.5 million

Savings if cut/traded: $6.5 million saved, $13 million dead cap penalty

Verdict: Speaking of notable Gettleman failures ... this was a doozy. He handed Solder one of the richest contracts in NFL history two years ago and he has not lived up to it in any way. That’s a bit too significant of a cap penalty to cut ties now, but the Giants should both be adding an upgrade at right tackle and drafting a left tackle to develop as Solder’s replacement on the left side. He’s, by all accounts, a solid locker room presence who knows Joe Judge, so there’s no point in severing ties just yet.

- TE RHETT ELLISON

2020 cap hit: $7.188 million

Savings if cut/traded: $5 million saved, $2.188 million dead cap penalty

Verdict: Ellison being cut is all but a foregone conclusion, especially with that savings. The Giants will roll with Evan Engram, Kaden Smith and whoever else they add or draft this offseason.

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- LB KAREEM MARTIN

2020 cap hit: $5.966 million

Savings: $4.8 million saved, $1.16 million dead cap penalty

Verdict: Martin has done a whole lot of nothing since signing a three-year, $21 million contract in 2017. He has 1.5 sacks, 54 tackles and zero forced turnovers in two seasons. He’s likely gone, too.

- WR GOLDEN TATE

2020 cap hit: $10.35 million

Savings if cut/traded: $3.29 million saved, $7.05 million dead cap penalty

Verdict: It doesn’t make much sense to move on from Tate, who played well last season, especially with the minimal savings. More likely, the Giants start to build the receiving corps around Darius Slayton and Sterling Shepard — plus a rookie, maybe — and look to get out of Tate’s contract in 2021. The Giants shouldn’t be in the business of removing productive weapons from the offense around Daniel Jones.

- S ANTOINE BETHEA

2020 cap hit: $2.875 million

Savings if cut/traded: $2.75 million saved, $125,000 dead cap penalty

Verdict: Bethea is a good veteran presence, but not a good football player anymore at this stage of his career. This should be a relatively easy decision for Gettleman to make.

- OL SPENCER PULLEY

2020 cap hit: $2.75 million

Savings if cut/traded: $2.75 million saved, zero dead cap penalty

Verdict: It’s a fairly inexpensive deal, so the Giants can stand to keep Pulley around as a backup center for another year unless they really need that extra $2.75 million later in the offseason.

- QB ALEX TANNEY

2020 cap hit: $1.037 million

Savings if cut/traded: $1 million saved, $37,500 dead cap penalty

Verdict: If this was going to happen it would more likely be after training camp than before free agency. He’s a valued presence for Daniel Jones in the building, even if he brings next to no value as an actual quarterback. The Giants should be looking to upgrade the backup quarterback position this offseason.

- RB WAYNE GALLMAN

2020 cap hit: $839,912

Savings if cut/traded: $735,000 saved, $104,912 dead cap penalty

Verdict: It doesn’t make much sense to release Gallman, though perhaps they can find a conditional late-round pick on the trade market. He fell out of favor, for some reason, toward the end of the season and didn’t play. It is a new coaching staff now, though, so he’ll have a chance to at least prove himself in training camp.

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Zack Rosenblatt may be reached at zrosenblatt@njadvancemedia.com. Follow him on Twitter @ZackBlatt. Find NJ.com on Facebook.