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Available both stock/untouched and Heat Rolled with Progressive Pressure - choose your preference during checkout!
Every fastpitch lineup has a hitter who’s outgrown her -10 and knows it. The ball’s coming off the bat loud, the swing’s gotten faster than it needs to be, and the extra ounce she’s been missing is the difference between a double off the wall and a ball that clears it! The 2027 Mizuno F27 CRBN1 -9 is built for her. It’s the heaviest drop in Mizuno’s F27 CRBN1 lineup, one ounce more than the -10 drop at the same length, in a one-piece composite that gives a strong hitter the stiff, direct, connected feel that a two-piece can’t quite match. It comes in 32, 33, and 34 inch lengths only, which tells you exactly who Mizuno had in mind: high school, college, and elite travel hitters with the strength to carry it. And it wears the White-Pink Tetra colorway, a light barrel with pink-to-orange graphics, a matching grip, and purple accents, so it looks as sharp as it hits.
More mass only helps if the barrel delivers on it, and the CRBN1’s barrel is the reason the bat has a following. X-Zone Technology adjusts the composite angles in ten specific zones across the barrel, tuning each section to flex and respond from the taper to the end cap, which creates a massive sweet spot and keeps performance consistent when contact isn’t perfectly centered. Mizuno builds it as a Double Wall barrel for a larger hitting area with more power and forgiveness, uses Cylinder Seaming for consistent performance and durability around the full circumference, and lays it up in Black Onyx Carbon for durability over a long season. The part that matters most on a heavier one-piece is Mizuno’s enhanced AntiShock construction in the taper, engineered to reduce the vibration that reaches the hands on a mishit, because a -9 has more mass behind the jam shot too. The Optimized End Cap adds pop at the end of the barrel and produces the booming sound CRBN1 hitters recognize, and a Speed-Helix Grip finishes the handle with comfort and durability. Full 2-1/4 inch barrel, approved for USA Softball, USSSA, NSA, ISA, and WBSC play, backed by Mizuno’s one year warranty.
The -9 is the easiest CRBN1 to buy too early. A hitter who moves up before her swing is ready loses bat speed, and losing bat speed costs more than the extra ounce gives back. That’s exactly the kind of decision LongballBats.com is here for. We’ve been the Bat Performance Experts since 2016, our friendly staff offers players, parents and coaches more than 100 years of combined baseball and softball experience, and we carry the full Mizuno CRBN lineup, so we can tell you honestly whether your hitter is ready for the -9, whether she should stay in the -10 for another season, or whether the two-piece CRBN Pro suits her better. Tell us her age, size, current bat, and what kind of hitter she is, and we’ll get her into the right Mizuno - the first time.
- Brand: Mizuno
- Sport: Fastpitch Softball
- Barrel Diameter: 2-1/4 inches, the largest allowed per stamp
- Drop: -9 drop weight, the heaviest drop in the F27 CRBN1 lineup, with one more ounce than the -10 at the same length
- Certification: USA Softball (ASA), USSSA, NSA, ISA, and WBSC/ISF leagues and tournaments
- Balanced swing feel, with the drop weight adding mass without shifting it toward the end cap
- One-piece composite construction for maximum mobility, a direct feel, and comfort through the swing
- Black Onyx Carbon composite for increased durability
- Cylinder Seaming for consistent performance and durability across the barrel
- Double Wall barrel for higher peak performance with a larger sweet spot, more power, and more forgiveness
- X-Zone Technology that creates a massive sweet spot by adjusting composite angles in 10 specific zones across the barrel
- Enhanced AntiShock construction in the taper to reduce vibrations felt in the hands for a smoother feel at contact
- Optimized End Cap that produces a booming sound on batted balls while expanding the sweet spot for more pop
- Speed-Helix Grip designed for comfort and durability
- One year manufacturer’s warranty from Mizuno
- White-Pink Tetra colorway, a light barrel with pink-to-orange graphics, a matching grip, and purple accents
- Available sizes: 32"/23oz, 33"/24oz, 34"/25oz
- Year Released: 2026
- Adding our Heat Roll with Progressive Pressure to your order may cause decertification, check with the governing body of your league for clarification
Manufacturing tolerances, performance considerations, and grip weight may cause variations from the listed weight.
FREQUENTLY ASKED QUESTIONS
QUESTION: Should I order this bat stock/untouched or Heat Rolled with Progressive Pressure?
ANSWER: If you order your new bat Heat Rolled with Progressive Pressure, it will be delivered to you completely and evenly broken in. This process adds 20-40ft of distance to your solid hits, increases consistency, improves durability and adds 2-3 business days of lead time to your order. If you plan to use the bat in an official game or event, please verify the legality of our process with your league or sanctioning body before use. We (LongballBats.com) do not encourage the use of a Heat Rolled bat in any game or event where it is against the rules. Click here for details about our process!
QUESTION: Is the CRBN1 -9 end loaded?
ANSWER: No. Drop weight and swing weight are two different things. The -9 describes the relationship between the bat’s length and its total weight, so a 33 inch -9 weighs 24 ounces. End loading describes where that weight sits along the bat, and the CRBN1 is built with a balanced feel, with the extra ounce of the -9 spread through the bat rather than stacked at the end cap. The result is a bat that swings heavier than a -10 but still feels controllable through the zone. Hitters who want a true end-loaded power bat should look elsewhere. Hitters who want more mass behind a quick, balanced swing are exactly who the -9 is for.
QUESTION: When should a hitter move from the CRBN1 -10 to the -9?
ANSWER: When she can swing the -9 with the same bat speed and timing as her -10, not just for a few hard cuts but through a full practice. The best test is a cage session with both bats at the same length: if her swing stays repeatable and her contact stays consistent with the -9, she’s ready. If she starts to get late on good pitching or her mechanics change, one more season in the -10 is the better call. Most hitters making the move are in high school or college, but strength and swing quality matter more than age. The -9’s 32 to 34 inch size run is built for that player.
QUESTION: Who is the CRBN1 -9 built for, and where is it legal?
ANSWER: Strong high school, college, and elite travel hitters who want a one-piece feel with more mass behind the ball. The CRBN1 -9 carries approval for USA Softball, USSSA, NSA, ISA, and WBSC/ISF play, which covers rec leagues, travel ball, and the major tournament organizations, and the USA Softball stamp is the one most high school and college programs follow. It’s a fastpitch bat only and isn’t approved for slowpitch. As always, confirm your league’s approved bat list before game day.
