3 Impact Fantasy Baseball Prospects To Stash - Robby Snelling, Cole Carrigg, Joe Mack

May 9, 2026

Three top fantasy baseball prospects - Robby Snelling, Cole Carrigg, Joe Mack - that can make big impacts. These MLB prospects are waiver wire pickups or stashes.

Targeting high-end prospects can be the difference between winning and losing your fantasy league. So far, managers have seen high-impact players like Noah Schultz and Payton Tolle showcase elite potential in their brief stints in the majors this season.

In this piece, we will look at two prospects from the Miami system and a budding outfielder in the Rockies pipeline.

Should fantasy managers stash these high-end prospects? Let's dive in!

Robby Snelling, SP, Miami Marlins

Current Level: AAA
Availability: 10% rostered
2026 AAA Stats: 29 IP, 1.86 ERA, 0.90 WHIP, 44 SO, 15 BB

Once again, holding the No. 1 spot on our list is Robby Snelling of the Marlins. As we have done in the past, I want to give a quick "nod" to another arm in the Miami system, Braxton Garrett, who is also nearing a promotion. However, unlike Snelling, Garrett has already had extensive experience in the majors and is not a traditional prospect. Garrett has posted a strong 2.30 ERA with a 0.80 WHIP across his first 31 1/3 innings of action this season.

With that being said, Snelling actually surpassed Garrett in the pecking order in this system. Earlier on Tuesday, the Marlins designated veteran right-hander Chris Paddack for assignment, which officially opened a spot in the starting rotation. Garrett, who was on the 40-man roster, seemed like the top option to earn the call. However, he made his next start at Triple-A later that evening, suggesting he may not be in the mix for an early promotion.

As a result, Snelling is slated to not only replace Paddack's position in the rotation on Friday (which was his next scheduled start), but also be the long-term option.

Snelling made his last Triple-A start on May 1, putting him in a prime spot to make his MLB debut later this week without greatly affecting his current pitching schedule. In his most recent outing, the southpaw looked just as sharp as usual, logging five no-hit frames with nine punchouts and only one walk. This dominant effort came after Snelling's "worst" outing of the year, where he allowed five walks and two runs over five innings against Gwinnett.

Overall, the left-hander has logged 29 innings to the tune of an elite 1.86 ERA and a 0.90 WHIP. During this stretch, Snelling has struck out 44 hitters while walking 15 batters. While his command may seem shaky on the surface, seeing that five of these walks came in one game, managers should not be overly concerned.

With Paddack now out of the picture, Snelling is primed to see at least a taste of the majors, which could open the door for extension if he can carry this momentum into his MLB debut. His high-end strikeout upside alone makes him not only the top pitching prospect to stash in all leagues, but also potentially the top prospect in all of baseball to stash.

Finding a prospect like Snelling on the waiver wire who has not only this much upside on a per-start basis, but a path to remaining in the majors for the remainder of the season is rare.

Later Wednesday evening, the Marlins made it official that they were promoting Snelling ahead of his MLB debut on Friday evening. Even though Snelling endured some growing pains in his MLB debut on Friday night, the southpaw possesses elite strikeout upside that is worth picking up in all formats.

Robby Snelling tossed five no-hit innings with 9 K today to lower his ERA to 1.86 this season.

Bring him up Miami. Free Snelling!#FightinFishpic.twitter.com/AEI05SKNPd

— Eric Cross (@EricCrossMLB) May 2, 2026

-Written by Andy Smith

Cole Carrigg, OF, Colorado Rockies

Current Level: AAA
Availability: 5% rostered
2026 AAA Stats: 32 G, .371/.431/.532, 6 2B, 2 HR, 20 SB

The Rockies selected Carrigg, a San Diego State product, with the 65th overall pick in the 2023 MLB Draft. He signed for $1.3 million and has been worth every penny, consistently producing at all levels of the minors.

Carrigg has been aggressive, but he also knows his zone, posting a 74.2% in-zone swing rate (86th percentile) this year. He's not striking out much, and he's capable of making loud contact with a maximum exit velocity of 110.1 mph (77th percentile). The 23-year-old is mostly a pull-side hitter, and he's tapped into modest power with 15+ homers in each of his last two minor league seasons.

Last week, Carrigg went 14-for-24 with one home run, two doubles, one triple, and eight RBI. He also had two walks, three strikeouts, and four stolen bases — largely thanks to a three-steal effort on Wednesday. Carrigg's bat-to-ball skills and rare speed profile give him the tools necessary to succeed at the next level. He should make his MLB debut by the end of June.

Cole Carrigg smokes an RBI double to extend his on-base streak to 2⃣2⃣ games!

B3: Duke City 10, Chihuahuas 1 pic.twitter.com/NSiRwFJkMX

— Albuquerque Isotopes (@ABQTopes) May 2, 2026

- Written by Andersen Pickard

Joe Mack, C, Miami Marlins

Current Level: AAA
Availability: 5% rostered
2026 AAA Stats: 24 G, .244/.388/.378, 3 HR, 1 SB

First @MLB hit ✅
First @MLB RBI ✅

Joe Mack has arrived pic.twitter.com/rwkq2XWHeD

— Miami Marlins (@Marlins) May 5, 2026

Mack is widely regarded as one of the game’s better defensive catching prospects and should give the Marlins’ pitching staff an immediate boost. Offensively, he profiles as a slightly below-average hitter, but has shown steady improvement in recent years. After hitting just .217/.324/.303 over his first three professional seasons, the left-handed hitter made a key adjustment by attacking fastballs earlier in counts, which helped him tap into more power.

That change paid off, as he posted a 136 wRC+ across High-A and Double-A in 2024, followed by a 120 wRC+ in Triple-A last season. For fantasy purposes, Mack is worth rostering in 15-team, two-catcher formats, but expectations should be tempered. He’s likely to split time behind the plate with Liam Hicks, and when he does play, he's projected to hit in the bottom third of the lineup.

He’ll also spend half his games at loanDepot park, one of the more pitcher-friendly environments in MLB. ATC projects the 23-year-old for nine home runs and three stolen bases with a .220/.283/.373 slash line, along with a 28.3% strikeout rate and a 7.4% walk rate. If you’ve been hit by injury at catcher or need an upgrade at C2, Mack is worth monitoring, but don’t overspend in FAAB or move on from players with more upside.

- Written by Marty Tallman

2026 Prospect Fantasy Baseball Redraft Stash Rankings

Who are the top fantasy baseball prospects to know? Check out our latest 2026 prospect fantasy baseball rankings which are updated regularly by Eric Cross:

Promoted Last Week: Trey Yesavage (TOR), Elmer Rodriguez (NYY), Travis Bazzana (CLE)

Promoted This Week: Bryce Eldridge (SFG), Joe Mack (MIA)

Honorable Mentions (Hitters): Lazaro Montes (SEA), Harry Ford (WAS), Ryan Clifford (NYM), Kemp Alderman (MIA), Esmerlyn Valdez (PIT), Gabriel Gonzalez (MIN), Zac Veen (COL), Deyvison De Los Santos (MIA), Hector Rodriguez (CIN), Michael Arroyo (SEA), Jonathon Long (CHC), Blaze Jordan (STL), Jacob Melton (TBR), James Tibbs (LAD)

Honorable Mentions (Pitchers): Gage Jump (ATH), Carlos Lagrange (NYY), Hagen Smith (CHW), Jaxon Wiggins (CHC), Trey Gibson (BAL), Brody Hopkins (TBR),  Kendry Rojas (MIN), River Ryan (LAD)

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2026 Player Decisions. Looking to pick up someone else instead? Today's focus is on specific players like Robby Snelling, Cole Carrigg, Joe Mack, Jason Junk, Chase Dollander, Max Clark, Thomas White, Charlie Condon, Henry Bolte, Rico Garcia. These are some common searches for 2026 fantasy baseball waiver wire pickups.

Using The Tool. This is a simple tool but very powerful. The first step is to enter the player names that you want to compare. In the first box, search for the first player's name. In the second box, search for the second player's name. Compare up to four MLB players at once, and then click the Who To Pickup? button to see who the recommended waiver wire pickups are based on fantasy baseball rankings, projections, and more.

Improvements For Who Should I Pickup? You may have noticed, our Who Should I Pickup? tool has gotten an overhaul. We've added lots of great features for you to give you as much information as possible to win on the waiver wire in 2026. You'll see MLB player tiles with stats, projections, and a slick new interface. We hope you enjoy!

How It Works. Our RotoBaller staff puts together their weekly fantasy baseball waiver wire rankings and projections based on their research, and updates them constantly throughout the week. That information is the core data that is powering the decision-making in this tool. When you search for player names, you will only see those players who are ranked.

Popular Player Comparison Searches - Who To Pickup

Looking to pick up someone else instead? Below are some popular searches and comparisons from our Who To Pickup tool for 2026 for players like Robby Snelling, Cole Carrigg, Joe Mack, Jason Junk, Chase Dollander, Max Clark, Thomas White, Charlie Condon, Henry Bolte Rico Garcia:

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