By Darryl Slater | NJ Advance Media for NJ.com

With the first wave of 2018 NFL free agency in the rearview mirror, let's take a look at how much salary cap space the Jets have left, after bringing in free agents like cornerback Trumaine Johnson and quarterback Teddy Bridgewater.

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This is quite the big offseason for Jets general manager Mike Maccagnan, who has a huge task on his hands with the third overall pick in the 2018 NFL Draft. He traded up from sixth to third, in order to take a quarterback.

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SALARY CAP SPACE TO START

The Jets entered free agency with an NFL-high $89.879 million in salary cap space. So what were they going to do with it? Well, they wanted to sign quarterback Kirk Cousins, but that didn't work out. So let's assess what they actually have done.

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DRAFT POOL

Remember, even though the Jets now have six draft picks (instead of eight, because of that trade up with the Colts), they still need to set aside $8.485 million to sign their draft picks.

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THE IMPORTANT CAVEAT

It is worth remembering, too, that teams don't go into a season pressed up against the salary cap ceiling. They like to keep a few million around just in case they have to make moves during the season. And teams can carry over cap space from one year to the next, as well.

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CB TRUMAINE JOHNSON: SIGNED

2018 CAP HIT: $10 million (full contract details here)

ANALYSIS: You have to pay big bucks to land a top-line cornerback, and the Jets did just that with Johnson. They gave him $34 million fully guaranteed at signing. Let's see if it works out better than the failed signings of Darrelle Revis and Mo Wilkerson.

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RB ISAIAH CROWELL: SIGNED

2018 CAP HIT: $2 million (full contract details here)

ANALYSIS: A team-friendly contract for the Jets, as they can move on from Crowell after one season. Don't be surprised if they draft a running back, as Bilal Powell is entering the last year of his deal.

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QB TEDDY BRIDGEWATER: SIGNED

2018 CAP HIT: $6 million (full contract details here)

ANALYSIS: The Jets gave him just $500,000 guaranteed (a signing bonus) on a one-year contract, so if his knee doesn't look up to par this summer, they can cut him at very minimal cost.

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MLB AVERY WILLIAMSON: SIGNED

2018 CAP HIT: $6 million (full contract details here)

ANALYSIS: He is tied to the Jets for at least two years, as they fully guaranteed him $16 million over that span. He replaces Demario Davis, who also got $16 million fully guaranteed over the first two years from the Saints.

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C SPENCER LONG: SIGNED

2018 CAP HIT: $6.625 million (full contract details here)

ANALYSIS: It is basically a one-year deal, with Long coming off quadriceps surgery. Team-friendly contract for the Jets.

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K CAIRO SANTOS: SIGNED

2018 CAP HIT: $2 million

ANALYSIS: A one-year deal to replace Chandler Catanzaro. Don't be surprised if the Jets bring in somebody to compete seriously with him this summer.

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LB BRANDON COPELAND: SIGNED

2018 CAP HIT: $1.2 million

ANALYSIS: A perfectly acceptable cap hit for a depth linebacker.

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WR TERRELLE PRYOR: SIGNED

2018 CAP HIT: $4.281 million

ANALYSIS: If he is healthy — he battled an ankle injury last year in Washington — he could bolster a Jets receiver room that already includes Quincy Enunwa, Robby Anderson, and Jermaine Kearse.

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WR/RETURNER ANDRE ROBERTS: SIGNED

2018 CAP HIT: $720,000

ANALYSIS: He has potential as a returner, but don't expect him to be a major factor as a receiver.

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QB JOSH MCCOWN: RE-SIGNED

2018 CAP HIT: $10 milion

ANALYSIS: He turns 39 this summer, but he played well enough last season that the Jets brought him back on a one-year, fully guaranteed contract. They're going to draft a quarterback, of course. Let's see how it all plays out, in terms of who starts in Week 1.

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CB MORRIS CLAIBORNE: RE-SIGNED

2018 CAP HIT: $7 million

ANALYSIS: A one-year deal to be the Jets' No. 2 corner, behind Johnson. Now, Claiborne doesn't have to worry about defending an opponent's No. 1 receiver every week.

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DT MIKE PENNEL: RE-SIGNED

2018 CAP HIT: $2.8 million

ANALYSIS: He gives the Jets some depth behind Steve McLendon in the middle of their defensive line.

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DE XAVIER COOPER: RE-SIGNED

2018 CAP HIT: $780,000

ANALYSIS: A low-commitment deal for a guy who wasn't tendered as a restricted free agent this offseason.

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WR QUINCY ENUNWA: TENDERED

2018 CAP HIT: $2.914 million

ANALYSIS: Even though he is coming off a neck injury, this was a no-brainer decision to give him a second-rounder tender. He might wind up being the Jets' best receiver in 2018, if he returns healthy.

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S RONTEZ MILES: TENDERED

2018 CAP HIT: $1.907 million

ANALYSIS: The low tender for Miles, who is a solid special teams player. A restricted free agent tender, presuming a player signs it (and all these guys surely will), is not guaranteed. That is worth remembering.

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TE NEAL STERLING: TENDERED

2018 CAP HIT: $1.907 million

ANALYSIS: The Jets needed bodies at tight end, with Austin Seferian-Jenkins heading to the Jaguars. Sterling is now the Jets' No. 3 tight end, behind Jordan Leggett and Eric Tomlinson.

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OT BRENT QVALE: TENDERED

2018 CAP HIT: $1.907 million

ANALYSIS: He has value, because he gives the Jets as a versatile backup on their offensive line.

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CAP HITS STILL UNKNOWN

LB Kevin Pierre-Louis (signed)

LB Neville Hewitt (signed)

S Terrence Brooks (re-signed)

OT Ben Ijalana (re-signed)

C Jonotthan Harrison (re-signed)

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ESTIMATED CAP SPACE LEFT

OK, so if you start with the starting amount ($89.879 million) ...

And then you factor in the draft pool ($8.485 million) ...

And the new signings ($38.826 million) ...

And the re-signings ($20.58 million) ...

And the restricted free agent tenders ($8.635 million) ...

The Jets currently have about this much cap space — $13.353 million.

But remember, there are still five (mostly modest) contracts whose 2018 cap hits aren't known — Pierre-Louis, Hewitt, Brooks, Ijalana, and Harrison.

And the Jets won't go into the season pressed up against the cap, so they need to save a few million dollars in cap space, in case of an emergency.

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GOOD USE OF RESOURCES?

Yes, the Jets didn't get a chance to throw a ton of money at Cousins, but they wound up getting a No. 1 cornerback, a new middle linebacker, and a new center. They needed all of those pieces. They also needed to solidify their quarterback situation before drafting somebody at that position. The McCown/Bridgewater duo does that. Crowell and Santos are low-risk deals. And Claiborne was an important re-signing.

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SO NOW WHAT?

The Jets still need to find a replacement for defensive end Muhammad Wilkerson, and they also need to get some edge rushing help. They can address those spots in the draft. In terms of other guys on the roster who could be cut, corner Buster Skrine and left guard James Carpenter are possibilities. But neither looks likely at this point. Skrine's release would free up $6 million in cap space, while Carpenter's would free up $4.7 million.

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Darryl Slater | NJ Advance Media

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Darryl Slater may be reached at dslater@njadvancemedia.com. Follow him on Twitter @DarrylSlater. Find NJ.com Jets on Facebook.