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21 oz Baseball Bats

Shop by Bat Certification

57 Results
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2019 Louisville Slugger Prime 919 Composite Bat USABat Certified (-10) Composite 21 oz 31" (Used)
EmpireSportsSideline Pro+
2019 Louisville Slugger Prime 919 Composite Bat USABat Certified (-10) Composite 21 oz 31" (Used)
$45
Retail price: $350
Used USABat Certified 2019 Easton Ghost X Evolution Composite Bat 31" (-10)
Bayside_SportsSideline Pro+
Used USABat Certified 2019 Easton Ghost X Evolution Composite Bat 31" (-10)
$54
Retail price: $350
Used USABat Certified 2019 Easton Ghost X Evolution Composite Bat 31" (-10)
Bayside_SportsSideline Pro+
Used USABat Certified 2019 Easton Ghost X Evolution Composite Bat 31" (-10)
$54
Retail price: $350
2019 Marucci CAT Composite Bat USSSA Certified (-10) 21 oz 31" (Used)
EmpireSportsSideline Pro+
2019 Marucci CAT Composite Bat USSSA Certified (-10) 21 oz 31" (Used)
$44
Retail price: $350
2019 Louisville Slugger Prime 919 Composite Bat USABat Certified (-10) Composite 21 oz 31" (Used)
Game_ReadySideline Pro+
2019 Louisville Slugger Prime 919 Composite Bat USABat Certified (-10) Composite 21 oz 31" (Used)
$45
Retail price: $350
2019 Marucci CAT Alloy USSSA Certified Bat (-8) 21 oz 29" (Used)
Ymmas
2019 Marucci CAT Alloy USSSA Certified Bat (-8) 21 oz 29" (Used)
$175
Retail price: $300
2019 Marucci Posey28 Alloy USSSA Certified Bat (-10) 21 oz 31" (Used)
eLyk2k1
2019 Marucci Posey28 Alloy USSSA Certified Bat (-10) 21 oz 31" (Used)
$30
New 2019 DeMarini CBZ CF ZEN 31/21 -10 YOUTH BASEBALL BAT
JunaAlv_30
New 2019 DeMarini CBZ CF ZEN 31/21 -10 YOUTH BASEBALL BAT
$154
2019 Easton Speed Alloy Bat USABat Certified (-10) Alloy 21 oz 31" (Used)
QuickChangeSideline Pro+
2019 Easton Speed Alloy Bat USABat Certified (-10) Alloy 21 oz 31" (Used)
$22
Retail price: $80
2019 Louisville Slugger Prime 919 Composite Bat USSSA Certified (-10) Composite 21 oz 31" (Used)
Game_ReadySideline Pro+
2019 Louisville Slugger Prime 919 Composite Bat USSSA Certified (-10) Composite 21 oz 31" (Used)
$50
Retail price: $350
2019 Louisville Slugger Select 719 Hybrid Bat USABat Certified (-10) Hybrid 21 oz 31" (Used)
QuickChangeSideline Pro+
2019 Louisville Slugger Select 719 Hybrid Bat USABat Certified (-10) Hybrid 21 oz 31" (Used)
$52
Retail price: $300
2019 DeMarini CF Zen (2 3/4") USSSA Bat (-10)
blowout_bargainsSideline Pro+
2019 DeMarini CF Zen (2 3/4") USSSA Bat (-10)
$44
Retail price: $350
2019 Marucci CAT Composite USSSA Bat (-10) 21 oz 31"
blowout_bargainsSideline Pro+
2019 Marucci CAT Composite USSSA Bat (-10) 21 oz 31"
$42
2019 Louisville Slugger Omaha 519 USSSA Bat (-10) 21 oz 31"
blowout_bargainsSideline Pro+
2019 Louisville Slugger Omaha 519 USSSA Bat (-10) 21 oz 31"
$23
Retail price: $100
Used USSSA Certified Marucci CAT 8 Alloy Bat -10 21OZ 31"
blowout_bargainsSideline Pro+
Used USSSA Certified Marucci CAT 8 Alloy Bat -10 21OZ 31"
$30
Used USSSA Certified Marucci Posey28 Alloy Bat -10 21OZ 31"
blowout_bargainsSideline Pro+
Used USSSA Certified Marucci Posey28 Alloy Bat -10 21OZ 31"
$29
Retail price: $230
2019 DeMarini Voodoo One Alloy USSSA Certified Bat (-10) 21 oz 31" (Used)
Mooreheadbr
2019 DeMarini Voodoo One Alloy USSSA Certified Bat (-10) 21 oz 31" (Used)
$40
Used USSSA Certified Marucci CAT 8 Alloy Bat -10 21OZ 31"
blowout_bargainsSideline Pro+
Used USSSA Certified Marucci CAT 8 Alloy Bat -10 21OZ 31"
$30
Retail price: $229
Used USSSA Certified Marucci CAT 8 Alloy Bat -10 21OZ 31"
blowout_bargainsSideline Pro+
Used USSSA Certified Marucci CAT 8 Alloy Bat -10 21OZ 31"
$30
Retail price: $230
2019 Marucci POSEY28 Pro Metal Smoke (2 3/4") Bat (-10)
blowout_bargainsSideline Pro+
2019 Marucci POSEY28 Pro Metal Smoke (2 3/4") Bat (-10)
$31
Retail price: $230
Marucci CAT8 USSSA 2 3/4" Bat 2019 (-10)
blowout_bargainsSideline Pro+
Marucci CAT8 USSSA 2 3/4" Bat 2019 (-10)
$40
Retail price: $230
Marucci Cat 9 -10
Schwamy06
Marucci Cat 9 -10
$50
2019 DeMarini CF Zen USSSA Bat (-10) Composite 21 oz 31"
blowout_bargainsSideline Pro+
2019 DeMarini CF Zen USSSA Bat (-10) Composite 21 oz 31"
$100
Retail price: $350
2019 Louisville Slugger Solo 619 Bat USSSA Certified (-10) Alloy 21 oz 31"
blowout_bargainsSideline Pro+
2019 Louisville Slugger Solo 619 Bat USSSA Certified (-10) Alloy 21 oz 31"
$30
Retail price: $200
Used USSSA Certified Marucci CAT 8 Alloy Bat -10 21OZ 31"
blowout_bargainsSideline Pro+
Used USSSA Certified Marucci CAT 8 Alloy Bat -10 21OZ 31"
$30
Easton Beast Speed Hybrid Bat USSSA Certified (-10) Hybrid 21 oz 31" (Used)
Kraken_Sports
Easton Beast Speed Hybrid Bat USSSA Certified (-10) Hybrid 21 oz 31" (Used)
$59
Used Kid Pitch (9YO-13YO) Marucci CAT Composite Bat USSSA Certified (-10) Composite 21 oz 31"
Kraken_Sports
Used Kid Pitch (9YO-13YO) Marucci CAT Composite Bat USSSA Certified (-10) Composite 21 oz 31"
$57
Retail price: $300
2019 Rawlings Quatro Composite USABat Certified Bat (-10) 21 oz 31" (Used)
Seanmcc
2019 Rawlings Quatro Composite USABat Certified Bat (-10) 21 oz 31" (Used)
$350
Retail price: $500
2019 Marucci CAT8 Alloy USSSA Certified Bat (-10) 21 oz 31" (Used)
Yankeedad
2019 Marucci CAT8 Alloy USSSA Certified Bat (-10) 21 oz 31" (Used)
$27
Used USSSA Certified 2019 Easton Elevate Alloy Bat -9 21OZ 30"
blowout_bargainsSideline Pro+
Used USSSA Certified 2019 Easton Elevate Alloy Bat -9 21OZ 30"
$24
Retail price: $90
2019 Marucci CAT 8 USSSA Alloy Bat -10 21OZ 31"
gglover01
2019 Marucci CAT 8 USSSA Alloy Bat -10 21OZ 31"
$27
Retail price: $100
2019 Rawlings Quatro Pro 30/-10 USA
Kenikh
2019 Rawlings Quatro Pro 30/-10 USA
$97
Retail price: $300

Shop 21 oz Baseball Bats

At SidelineSwap, we feature a diverse collection of 21 oz baseball bats suitable for players of all levels. Our marketplace allows you to buy and sell quality sports equipment, ensuring you find a bat that fits your playing style and budget. With options from top brands such as Rawlings, Easton, and Demarini, you're bound to discover the right bat to enhance your game.

Bat Certification Options

Choose from various bat certifications to meet league requirements. Our selection includes:

  • USSSA Certified: Ideal for tournament play
  • USABat Certified: Perfect for youth leagues
  • BBCOR Certified: Designed for high school and collegiate players

Additionally, take advantage of our Fall Sale, offering significant savings on select bats. Enjoy fast delivery options and hassle-free shopping with our Buyer Protection Guarantee, making sure your purchase is secure.

Join our community of athletes and find tips and tricks from fellow players to help you choose the right equipment. With thousands of listings, SidelineSwap is the platform where athletes come together to buy and sell their gear.

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