By Abbey Mastracco | NJ Advance Media for NJ.com

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PORT ST. LUCIE, Fla. -- The Mets' roster is looking like it's pretty set in terms of position players, but there's one problem with that: The infielders in camp have been giving the regulars a run for their money.

A few of the prospects have been putting up good numbers and putting together even better at-bats. Could one of them steal a spot?

Here's a look at who is in the Mets' infield and who could surprise.

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Jeff Roberson | AP Photo

Who's in: Adrian Gonzalez

Gonzalez is a major league bat and a major league glove. And if turns out that he doesn't have much left in the tank, the Mets have plenty of backup options.

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Jasen Vinlove | USA TODAY Sports

Who's in: Asdrubal Cabrera

Cabrera is a versatile infielder with an incredibly steady bat. He's valuable to the Mets and thinks the injury woes are behind him now that he's primarily playing second base.

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Jeff Roberson | AP Photo

Who's in: Todd Frazier

The Mets spent on a big bat for the middle of the order and a defensively sound third baseman. Frazier is an integral piece of the 2018 Mets puzzle.

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Reinhold Matay | USA TODAY Sports

Who's in: Amed Rosario

Rosario has to get better at the plate, but the Mets believe he's ready to play every day at the major league level. Even if he's still swinging at too many pitches, he's still the best defensive middle infielder on the major league roster.

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Jasen Vinlove | USA TODAY Sports

Who's in: Jose Reyes

He's fast, he's slick with the glove (so long as it's at second base or shortstop) and the Mets like the positive attitude and energy he brings to the ballpark every day. Reyes is no longer a star, but he'll be a fine utility man.

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Steve Mitchell | USA TODAY Sports

Who's in: Wilmer Flores

With the way he crushes left-handed pitching, the Mets might want to consider platooning him at first base or maybe even second. Flores has some defensive shortcomings but he was one of the Mets' best right-handed bats last year.

As for the candidates who could crack the roster...

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Howard Simmons | New York Daily News | TNS

Dominic Smith

The Dominic Smith saga dominated the Mets' first weekend of Grapefruit League games but he's quietly just worked on getting his quad healthy in the last week. He has resumed light baseball activities but that's it. As for a timeline to return to action, he doesn't have one. He's just hoping to get into some games before it's too late and show that he can drive the ball over the fences this year.

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Reinhold Matay | USA TODAY Sports

Peter Alonso

The big first baseman has been getting a lot of at-bats early in camp and the Mets have been impressed with how he's improved defensively. But with only one year of high-A under his belt, it's unrealistic that the club would have him skip so many levels.

However, Smith and maybe even Gonzalez should watch out for this power-hitting first base prospect.

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Steve Mitchell | USA TODAY Sports

Gavin Cecchini

Here's where things could get interesting. Cecchini's new swing sure is working: He's hitting .455 with five RBIs, two home runs and two walks. He's putting muscle behind an improved swing and getting the ball in the air more often. He needs to show some defensive improvements but he believes he will this season since he changed some arm angles.

The Mets have been patiently waiting for Cecchini to break out and many are starting to wonder if it will ever happen. He needs a strong year now more than ever.

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Steve Mitchell | USA TODAY Sports

Luis Guillorme

Guillorme is also playing the launch angle game and it just adds to his already impressive profile. He uses all fields, he's tough to strike out, he gets on base and he's the Mets' best defensive prospect. He did some hitting with Yoenis Cespedes in the offseason and is hoping to emulate an approach similar to his.

It's a small sample size, but Guillorme is 5-for-11 with a home run, five RBIs, two walks and no strikeouts this spring.

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Reinhold Matay | USA TODAY Sports

Phillip Evans

You might remember Evans from the Donald Trump junior debacle, but what you might not remember is the bat that won him an Eastern League batting title two years ago. He's 3-for-10 with a home run and three walks this spring, but Evans is still seen mostly as organizational depth. However, he can successfully convert to catcher it wouldn't hurt his cause.

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David J. Phillip | AP Photo

Ty Kelly

The Mets like Kelly a lot. They like his versatility and the way he comes to the ballpark early and prepared every day. They liked him enough to put him on a postseason roster two years ago and the Opening Day roster last year, If he wanted to, he could play all nine positions, and the Mets always seem to need one or two of those guys along the way.

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Scott Rovak | USA TODAY Sports

David Thompson

The Mets are hoping Thompson can be their third baseman of the future, and while that future isn't now, it may be this summer. Thompson has the second-most spring at-bats and he's put them to good use, hitting .313 with a home run and two RBIs. His ability to play third base could put him ahead of Cecchini and Guillorme on the depth chart if Frazier gets injured, but it looks like Thompson will start the season in Triple-A.

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Abbey Mastracco may be reached at amastracco@njadvancemedia.com. Follow her on Twitter @abbeymastracco. Find NJ.com on Facebook.