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2019 Marucci CAT 6 (Gen 2) Review

By Bat Digest | Last Updated November 17, 2022

JustBats purchased the exclusive rights to the CAT 6. That is, the updated look on the CAT 6—with the red base and white accents—is a JustBats only bat. The expectation, as far as we understand it, is that such will be the case indefinitely. Making such an arrangement, as far as know, a first.

Price Check

2019 CAT 6 Video

2019 CAT 6 Video

2019 CAT 6 Models

The new CAT 6 is nothing new structurally from the older CAT 6. But, in so many ways, that is not a bad thing at all…


General Recomendations

The CAT 6 has been one of the highest rated bats ever. It has great sizing options, feels great and prices right where most people want it to be.

It has a middle of the road swing weight and uses the same proprietary knob found in new CAT bats from Marucci.

As a general sentiment, we’d recommend the bat for any player that prefers the stiff feel of a single piece bat and is looking for a real value purchase. The sizing options at JustBats make it available for any player. The heavier the weight (drop 8, drop 5, BBCOR) the more we tend to prefer to the CAT 6.


Model Recommendations


BBCOR Review

CAT 6 Gen 2 BBCOR Ratings (key)
4 3 4 4 4 4 4 5 4 4
MOI Tech Drb Flx Prof ReSl PlaRa ExVe Relv Dmnd

Sizing: 30, 31, 32, 33, 34-inch
Release Date: October 1, 2018
Serial: MCBC62
Bat Type: Single Piece Alloy
Barrel Size: 2 5/8
See other BBCOR Bats

USSSA Drop 10 Review

CAT 6 Gen 2 USSSA Drop 10 Ratings (key)
4 3 4 4 4 4 4 5 4 4
MOI Tech Drb Flx Prof ReSl PlaRa ExVe Relv Dmnd

Sizing: 28, 29, 30, 31, 32, 33-inch
Release Date: October 1, 2018
Serial: MSBC625
Bat Type: Single Piece Alloy
Barrel Size: 2 3/4
See other Drop 10 USSSA Bats

Comparable Bats

The Cat 6’s sting dampening knob makes it otherwise unique. No other bat uses such a tech (they can’t as Marucci has the patent). But, you can find some single piece aluminum bats from 2016 in the Omaha 516 and the Rawlings VELO. Both are legit choices, a bit ligther and also run a bit cheaper.

For the CAT 6 Generation 2 you can find similar bats in, wait for it, the CAT 6 Gen 1. As well as bats like the 519 Omaha and 5150 from Rawlings. None of them have the technology in the knob or as big a barrel—but they also cost less.

Previous Models

The previous version of the CAT 6 was the CAT 5-squared.

We aren’t quite sure the best version to compare to the CAT 6 Generation 2. It doesn’t have as a many thickness levels in the barrel as the CAT 8–which has 8 instead of 6. The aluminum has been upgraded, but not by much, since the CAT 6. In large measure the bat is a lot like the CAT 8—but Marucci has made legitimate upgrades in the last 4 years. Worth the $100+ more? That’s not a decision for us to make.

Here’s what we wrote originally about the CAT 6 Gen 1 in comparison with the CAT 5-Squared.

Also like the CAT 5-Squared, the CAT 6 is a balanced swing. The balance point of the bat was actually brought a little closer to the handle compared to the CAT5 but the overall weight distribution makes the CAT 6 and CAT 5-Squared swing weight nearly identical.

The CAT 6 does have some upgrades compared to the CAT 5-squared that are worth mentioning. For starters the barrel profile is larger. Meaning the bat has more plate coverage and a larger sweet spot when compared to the CAT 5-Squared. We found this improvement to be noticeable and appreciated.

As well, the durability of the knob is claimed to be improved. We haven’t swung the CAT 6 long enough, but we do know from personal experience that the CAT 5-Squared knob unscrewed itself (which you could screw back on) after considerable use. Marucci took this feedback and redesigned the inserted knob to last as long as the bat. If that is the case we will see, but we are willing to take their word on it for now.


Another notable change to the bat is its design. The CAT 5-Squared was designed in gray backing with black and red highlights and a black grip. On the CAT 6, the bat is a very glossy pearl white with sort of hologram hurricane circles in the design. (Get it? CAT 6, Hurricane, as in a Category 6 Hurricane?). The grip is gray to match the highlights on the bat.

On the BBCOR version of the bat Marucci also shaped the handle to transition into the knob. This larger widening handle increases the bottom hands contact to the bat which many hitters like. Those who like a skinny bottom hand handle can unwrap the tape and remove the plastic shaped cone on the bottom of the handle.

Overall Ratings

The overall rating uses seven different weighted metrics to determine our overall score. Half of total rating comes from the player and our exit speed tests (Player Rating: 25%, Performance: 25%).The other categories are Relevance (20%), Demand (10%), Durability (10%), Resell Score (5%), and Tech Specs (5%).

*: When a bat is denoted by a star (*) it is a preliminary rating. Expect it to be updated as we learn more about the bat and gather more data.

(PlaRa) Player Rating: We measure player rating from user reviews. Those users include our own hitters that we test at the lab as well as reviews we find online.

(ExVe) Performance: Performance measures the exit speeds and distances we capture in our hitting lab with HitTrax using these bats.

(Relv) Relevance: We measure the number of sizes and the MOI of the bat. Bats with a wider range of options get a better score.

(Dmnd) Demand: Demand is measured by consumer sentiment and the buzz around the bat.

(Drb) Durability: A bat’s durability is measured by user reviews as well as feedback from manufacturers.

(ReSl) Resell Score: Based on the price the bats go for used. Higher prices mean greater user demand which means, generally, a better bat. A resell value closer to its original price means a higher score.

(Tech) Tech Specs: We rate the bat on its technological advancements from previous years and compared to the industry at large. This is our chance to reward companies who are trying to innovate.
MOI or Mass Moment of Inertia is a measurement of bat swing weight. This quantifies how difficult it is to swing a bat. The industry often refers to this as things like End Load or Balanced but those words have been overused to the point of meaninglessness. We measure the actual swing weights of each bat we test using the industry-standard pendulum period, balance point, and scale weight. You can read more about that here.
The price is the original MSRP price of the bat.
The types of bats are single-piece alloy (SPA), two-piece composite (TPC), single-piece composite (SPC), hybrid (Hyb.), and wood (Wood). Hybrid bats are made of composite handles and alloy barrles.
The estimated date the bat began distribution.

Download our data.