Key features include: 

Marucci CAT9 Composite Baseball Bats

Both contact and power hitters who don’t mind a barrel-heavy bat.

Perfect bat for: 

The CAT9 Composite comes in two designs across two generations. The first, released in 2021, is gray, black, and red. And then it came out in red, white, blue, and gray. The first model was a more powerful, higher-performing bat. It has more exit velocity and is a hotter bat than the 2nd gen. Very durable, with very little breakage. Marucci's, across the board, have been good bats in terms of quality; they seem to last. Whether you're a power hitter or a small kid, the CAT9 Composite does very well.

Tony from BatExperts

The Marucci CAT 9 Composite bat represents a significant advancement in Marucci's approach to building bats for players who prefer the feel and performance of fully composite construction. Unlike its alloy counterparts within the CAT series, the CAT 9 Composite provides a massive barrel and balanced swing. With a philosophy deeply rooted in the insights and needs of actual players, Marucci’s Cat 9 Composite bat showcases the brand’s proficiency at using cutting-edge materials to elevate the performance of players at any age.

Here is a list that details the progression of this series, highlighting the main features and advancements with each new model.

Progression of the Marucci CAT 9 Composite Bat

The Marucci Cat 9 Composite shines with its use of multi-directional composite materials, enabling a level of responsiveness and barrel performance that's hard to match. While the CF Zen has a consistently strong performance across the barrel and the Easton ADV 360 offers a 360-degree barrel tuning, the Cat 9 Composite distinguishes itself with a balance between speed, power, and comfort, courtesy of its vibration-dampening connection technology. This makes the Cat 9 Composite a top choice for youth players aiming to elevate their game with a bat that delivers fluidity and force in equal measure.

Top Competitors 

Bats

Baseball

Sale

Length

Marucci

Brand

Drop

19OZ

21OZ

Weight

Used

Condition

USSSA Certified

Bat Certification

Composite

Bat Material

Kid Pitch (9YO-13YO)

Age Group

2 3/4"

Barrel

2021

Release Year

Black

Blue

Color

CAT X Composite

CAT X

CAT9

CAT8

CAT9 Connect

CAT X Connect

CAT9 Composite

CAT X Vanta

CAT7

JB19

Posey Pro Metal

CAT Composite

Posey28

AM22

CAT6

Marucci Black

CU26

Cutch22

Elite

Hex Alloy

Hex Alloy 2

Hex Composite

Team

BP28

Cat MSBC11Y

CATX VANTA COMPOSITE

Vanta

Model

United States (All)

US: Midwest

Canada

US: Northeast

US: South

Seller Location

Accepts Offers

Sold Items Only

Item Type

Elite Sellers

Quick Shippers

Shops (Businesses)

Lockers (Individuals)

Seller Type

Marucci CAT9 Composite Pastime (2 3/4") USSSA Bat 2021 (-10)

Marucci CAT9 Composite 2 3/4" USSSA Bat 2021 (-10)

Marucci CAT9 Composite Pastime 2 3/4 USSSA Bat 2021 (-10)

Used 2021 Marucci CAT9 Composite Bat USSSA Certified (-8) Composite 21 oz 29"

Used Marucci CAT9 Composite USSSA Certified Bat (-10) Composite 19 oz 29"

Used Kid Pitch (9YO-13YO) USSSA Certified 2021 Marucci CAT9 Composite Composite Bat (-10) 19 oz 29"

Used USSSA Certified 2021 Marucci CAT9 Composite Bat 29" (-10)

Used USSSA Certified Marucci CAT9 Pastime Composite Bat 29" (-10)

Used USSSA Certified Marucci CAT9 Composite Bat 29" (-10)

Used 2021 Marucci CAT9 Composite Bat USSSA Certified (-10) Composite 19 oz 29"

EXTREMELY HOT! Marruci CAT 9 Connect COMPOSITE 29/21 (-8) MASSIVE 2 3/4” Barrel!

Save up to 70% off the best selection of 29" Marucci Cat 9 composite Baseball Bats. Shop safely with SidelineSwap's Buyer Protection or list your gear for sale in seconds on the sports marketplace.

## Marucci CAT9 Composite Baseball Bat

The Marucci CAT 9 Composite bat represents a significant advancement in Marucci's approach to building bats for players who prefer the feel and performance of fully composite construction. Unlike its alloy counterparts within the CAT series, the CAT 9 Composite provides a massive barrel and balanced swing. With a philosophy deeply rooted in the insights and needs of actual players, Marucci’s Cat 9 Composite bat showcases the brand’s proficiency at using cutting-edge materials to elevate the performance of players at any age.

**Perfect bat for:** Both contact and power hitters who don’t mind a barrel-heavy bat.


### Key features include:



* **Multi-Directional Composite Material:** Creates an ultra-responsive barrel that offers a significant performance advantage across the entire hitting surface.
* **Maximum Barrel Length:** Provides a larger sweet spot and enhances the potential for off-center hits to still travel far and fast.
* **SDX LT Connection:** Reduces vibration on contact, delivering a more comfortable hitting experience without sacrificing power on swing-through.
* **Ring-Free Barrel Construction:** Eliminates dead spots for a more consistent performance and allows players to take full advantage of the bat's technical design.
* **Micro-Perforated Soft-Touch Grip:** Ensures comfortable, secure handling even in rigorous play conditions, reducing hand fatigue and enhancing control.
* **Balanced Swing Weight:** Optimizes bat speed and control, offering a perfect blend for hitters who value precision as much as power.


### Top competitors comparison: [DeMarini CF Zen](https://sidelineswap.com/shop/baseball/bats/demarini/cf-zen-2020/l8432) and the [Easton ADV 360](https://sidelineswap.com/shop/baseball/bats/easton/adv-360/l59709)

The Marucci Cat 9 Composite shines with its use of multi-directional composite materials, enabling a level of responsiveness and barrel performance that's hard to match. While the DeMarini CF Zen is praised for its consistently strong performance across the barrel and the Easton ADV 360 offers revolutionary 360-degree barrel tuning, the Cat 9 Composite distinguishes itself with a superior balance between speed, power, and comfort, courtesy of its meticulous engineering and vibration-dampening connection technology. This makes the Cat 9 Composite a top choice for youth players aiming to elevate their game with a bat that delivers fluidity and force in equal measure.


### Progression of the Marucci CAT 9 Composite Bat:

Here is a list that details the progression of this series, highlighting the main features and advancements with each new model.

**2017 - [CAT7](https://sidelineswap.com/shop/baseball/bats/marucci/cat-7/l7247) & CAT7 CONNECT**



* CAT7 and CAT7 Connect are introduced, featuring the upgraded AZ4X alloy for improved performance.
* CAT7 has a one-piece alloy construction, while CAT7 Connect offers a two-piece hybrid design with a carbon composite handle.
* Both models feature an increased sweet spot and an upgraded anti-vibration knob (AV2). 


**2019 - [CAT8](https://sidelineswap.com/shop/baseball/bats/marucci/cat8-2/l7709), CAT8 CONNECT, CAT COMPOSITE**



* CAT8, CAT8 Connect, and CAT Composite are launched.
* The barrels of CAT8 and CAT8 Connect are constructed using the new AZ105 alloy for higher performance at the sweet spot.
* Introduction of SDX EXT connection technology for a stiffer connection and improved energy transfer.
* CAT Composite, a two-piece composite bat, is introduced with SDX EXT and ring-free barrel construction. 


**2021 - [CAT9](https://sidelineswap.com/shop/baseball/bats/marucci/cat9-2/l163499), CAT9 Connect, [CAT9 Composite](https://sidelineswap.com/shop/baseball/bats/marucci/cat9-composite-3/l164870)**



* CAT9 and CAT9 Connect are released with the new AZR alloy for a more responsive microstructure.
* CAT9 features a 2nd Generation AV2 Anti-vibration knob and additional weight below the hands for better control.
* CAT9 Connect introduces the Outer-Locking System (OLS) for an even stiffer connection and virtually zero vibrations.


### What people are saying (edited for clarity and brevity)

**PROS**



* It had a great balance and weight, which made it easy to swing and hit the ball with precision.
* Great pop and appearance. My son loves it. Easy to get good exit velo.
* Huge sweet spot and very durable. Has a great feel and sound to it. 

**CONS**



* A few hits scuff paint off bat.
* When it doesn’t get hit on the sweet spot it doesn’t go very far and stings.
* It's a lilttle pricey and i already broke it... but i am going to buy a new one


### **Certification**: USSSA, USA, and BBCOR


### Expert Notes ([Tony from BatExperts](https://sidelineswap.com/batexperts))

The CAT9 Composite comes in two designs across two generations. The first, released in 2021, is gray, black, and red. And then it came out in red, white, blue, and gray. The first model was a more powerful, higher-performing bat. It has more exit velocity and is a hotter bat than the 2nd gen. Very durable, with very little breakage. Marucci's, across the board, have been good bats in terms of quality; they seem to last. Whether you're a power hitter or a small kid, the CAT9 Composite does very well. 


Pop: ⭐⭐⭐⭐⭐

Durability: ⭐⭐⭐⭐

Vibration: ⭐⭐⭐⭐

 
<span style="text-decoration:underline;">**Mid-Balanced**</span> or End loaded?