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2021 Marucci CAT 9 Composite Review

Best Bat Digest score 93/100
Top grade A
Score range: 77-93/100 across 5 scored models Top model: 2022 Marucci CAT9 Composite Pastime BBCOR -3
May 31, 2026
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2021 Marucci CAT 9 Composite Review
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Who should buy the 2021 Marucci CAT 9 Composite?

If buying: Consider the 2021 Marucci CAT 9 Composite if this matches your player: Baseball hitters who want a two-piece composite option across BBCOR and USSSA in -10 to -3. Choose the exact certification and drop first, then use the score and model table on this page to compare the available versions.

2021 Marucci CAT 9 Composite full bat view

Best for

  • Baseball hitters who want a two-piece composite option across BBCOR and USSSA in -10 to -3.
  • Hitters choosing -10 to -3 drops in BBCOR and USSSA.
  • Shoppers comparing multiple drops or certifications inside the same model line.

Skip if

  • You do not want to sort through certification-specific versions before buying.
  • You want a new warranty-backed bat instead of shopping an older model.

Confidence: Published Review This uses Bat Digest catalog data, ratings data, and existing review notes; current availability, warranty coverage, and used-market condition may vary.

Is the 2021 Marucci CAT 9 Composite a good bat?

The 2022 Marucci CAT9 Composite Pastime (BBCOR) is a two piece composite bat reviewed by Bat Digest.

What should you know about the 2021 Marucci CAT 9 Composite?

  • How good is the 2022 Marucci CAT9 Composite Pastime in our rankings: It is ranked 11 out of 424 in BBCOR -3 bats.
  • Who is the 2021 Marucci CAT 9 Composite for: Baseball hitters who want a two-piece composite option across BBCOR and USSSA in -10 to -3.
  • Construction: Two Piece Composite
  • Drop options: -10 to -3
  • Price: $250 - $550

What are the 2021 Marucci CAT 9 Composite specs?

  • Year: 2021
  • Brand: Marucci
  • Model Name: CAT 9 Composite
  • Drop: -10 to -3
  • Construction: Two Piece Composite
  • Original Price: $250 - $550

What evidence is this based on?

What we know

  • Available as BBCOR and USSSA, -10 to -3 drops, 24 to 34 inches sizes, $250 - $550 pricing.
  • Construction: Two Piece Composite.
  • The score module is generated from Bat Digest ratings data for the associated model set.

What we have not tested yet

  • Every used-market copy or later production batch.
  • Current seller pricing, warranty coverage, and availability.
  • Whether league rules or stamp requirements have changed since the original review period.
  • Variant, drop, size, price, and certification facts come from current Bat Digest catalog data.
  • Buyer-fit language is based on the existing Bat Digest review notes and watchouts in this file.
  • Scores and score ranges come from Bat Digest ratings data rather than static article copy.

What about durability and legality?

Legality: Multi-certification The line spans BBCOR and USSSA; match the exact certification and drop to your league.

  • For older composite bats, used-bat condition matters more than original marketing claims.
  • Used-bat condition can matter more than the original review grade.

What bats are comparable to the 2021 Marucci CAT 9 Composite?

The idea of a two-piece composite bat with a HUGE barrel is common in the USSSA space. Companies like DeMarini and the CF Zen, Easton and their Ghost X (Mako), Rawlings and their Quatro have been living there, and thriving there, for quite a while. The CAT Composite reminds us most of a nearly unheard of bat in the Mizuno Ghost in terms of barrel size. However, as of 2018, the Mizuno Ghost was only a USA Bat. Marucci has yet to get into the USA space. If we compare construction and drop sizes, then bats like Easton's Ghost X and DeMarini's CF Zen fit a close competitor to the CAT Composite.
2020 DeMarini CF Glitch

2020 DeMarini CF Glitch

Overall: A- (92/100) Rank #25/126

Closest same-lane comp: another USSSA two-piece composite to check for feel, value, and model fit.

2021 DeMarini CF

2021 DeMarini CF

Overall: A- (92/100) Rank #25/126

Closest same-lane comp: another BBCOR and USSSA two-piece composite to check for feel, value, and model fit.

2020 DeMarini CF

2020 DeMarini CF

Overall: A- (92/100) Rank #25/126

Closest same-lane comp: another BBCOR and USSSA two-piece composite to check for feel, value, and model fit.

2021 Marucci CAT 9 Composite FAQ

Is the 2021 Marucci CAT 9 Composite a good bat?
It makes the most sense for this player fit: Baseball hitters who want a two-piece composite option across BBCOR and USSSA in -10 to -3. The score strip and model table are the quickest way to compare the listed variants.
Which 2021 Marucci CAT 9 Composite model should I buy?
Start with the certification and drop your player actually needs. Do not use the grade from one certification as a guarantee for a different version.
What bats compare to the 2021 Marucci CAT 9 Composite?
Start with 2020 DeMarini CF Glitch, 2021 DeMarini CF, 2020 DeMarini CF; those are the closest useful cross-shops in this review set.

Video review

How does it rate?

Overall score is Bat Digest's 100-point rating. Prices and availability can move.

Score range: 77-93/100 across 5 scored models Top model: 2022 Marucci CAT9 Composite Pastime BBCOR -3
Model League Drop Overall score Power Control Quality Value Price Check price
2021 Marucci CAT 9 Composite USSSA full bat view CAT 9 Composite MJBBCCP9 USSSA -10 77/100 C+ B A B+ B+ $250
2021 Marucci CAT 9 Composite USSSA full bat view CAT 9 Composite MSBCCP95 USSSA -5 90/100 A- B+ A+ A C $350
2021 Marucci CAT 9 Composite USSSA full bat view CAT 9 Composite MSBCCP98 USSSA -8 93/100 A A A+ A A $350
2021 Marucci CAT 9 Composite USSSA full bat view CAT 9 Composite MSBCCP910 USSSA -10 90/100 A- A A+ B+ B+ $350
2022 Marucci CAT9 Composite Pastime BBCOR full bat view CAT9 Composite Pastime MCBCCP9A BBCOR -3 93/100 A A A+ A B+ $550

What is the quick review?

Marucci is releasing a new bat for 2021 called the Marucci CAT 9 Composite. This is a two-piece composite bat found in USSSA, USA, and BBCOR. The bat will compete directly in a very competitive two-piece market against bats like the META, CF, ADV 360, and Quatro Pro. The bat has a balanced swing, huge barrel and, according to some our hitters, hits absolute rockets.

What models and sizes are available?

Our hitters like the big barrel, smooth swing, and great feel of the 2021 Marucci CAT 9 Composite. The drop 5 CAT Connect competes with the best in the business. (Yes, that is, the drop 5 Cat Connect competes with the CF Zen). The bat has not been out long enough to make commentary on the durability, but we're hopeful.

How is it built?

Marucci's CAT Connect is a two-piece composite bat built with a HUUUGE barrel and nice connection piece. The connection piece, which helps absorb mishit balls' sting, is the same one used on the high-end BBCOR CAT 8 Connect. The bat comes in a few different drops (5, 8, and 10) and, for their class, have a swing weight in the middle of the road. Not too light, not too heavy. (MOI we measured on a 31/21 was 5800 or about 1.5% above the average---well within our margin of error).

How does it compare?

There isn't a real last year's version of the Marucci CAT Composite. But, for sure, Marucci took what they learned from the Marucci Hex Connect and made it into a better version. Though, Serious upgrades go into the CAT connect, including the connect (SCX) connection used in the Cat 8 BBCOR Connect.
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