{"product_id":"marucci-f5-10-usssa-junior-big-barrel-baseball-bat-mjbbf55","title":"Marucci F5 -10 USSSA Junior Big Barrel Baseball Bat MJBBF55","description":"\u003cdiv class=\"sis-f5-desc sis-f5-jbb\"\u003e\n\u003cstyle\u003e\n.sis-f5-desc{max-width:900px;margin:0 auto;line-height:1.6;font-family:inherit;color:inherit}\n.sis-f5-desc h2,.sis-f5-desc h3,.sis-f5-desc h4{font-family:inherit;color:inherit;margin:1.4em 0 .5em}\n.sis-f5-desc ul{margin:.5em 0 1em 1.2em;padding:0}\n.sis-f5-desc li{margin-bottom:.4em}\n.sis-f5-desc table{width:100%;border-collapse:collapse;margin:.75em 0 1.25em;font-size:.95em}\n.sis-f5-desc table th,.sis-f5-desc table td{border:1px solid rgba(0,0,0,.12);padding:8px 10px;text-align:left}\n.sis-f5-desc table th{background:rgba(0,0,0,.04);font-weight:600;width:42%}\n.sis-f5-desc .sis-faq-item{border:1px solid rgba(0,0,0,.12);border-radius:6px;margin-bottom:8px;padding:0}\n.sis-f5-desc .sis-faq-item summary{cursor:pointer;font-weight:600;padding:12px 14px;list-style:none}\n.sis-f5-desc .sis-faq-item summary::-webkit-details-marker{display:none}\n.sis-f5-desc .sis-faq-item summary::before{content:\"+ \";font-weight:700}\n.sis-f5-desc .sis-faq-item[open] summary::before{content:\"– \"}\n.sis-f5-desc .sis-faq-item p{padding:0 14px 14px;margin:0}\n.sis-f5-desc .sis-links-list{margin:.5em 0 1em 1.2em}\n.sis-f5-desc a{text-decoration:underline}\n\u003c\/style\u003e\n\n\u003cp\u003eTraditional feel. Precise balance. Multi-variable walls. The Marucci F5's one-piece alloy design gives young hitters the balance, bat speed, and control to start driving the ball at the dish — without the price tag of Marucci's premium series.\u003c\/p\u003e\n\n\u003ch2\u003eMarucci F5 Junior Big Barrel USSSA Baseball Bat – MJBBF55\u003c\/h2\u003e\n\n\u003cp\u003eBuilt specifically for coach pitch players ages 5–7, the \u003cstrong\u003eMarucci F5 Junior Big Barrel\u003c\/strong\u003e pairs a big, forgiving 2¾\" barrel with the same one-piece alloy construction found across the rest of the \u003ca href=\"\/collections\/marucci-baseball-bats\"\u003eMarucci baseball bat lineup\u003c\/a\u003e. It's an ideal step-up bat for players moving out of tee ball and into their first coach pitch or machine pitch leagues.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMulti-variable wall design creates an expanded sweet spot with high durability\u003c\/li\u003e\n\u003cli\u003eRing-free barrel technology offers greater performance with no \"dead\" spots\u003c\/li\u003e\n\u003cli\u003eBalanced, one-piece alloy construction produces a clean, consistent, traditional swing feel\u003c\/li\u003e\n\u003cli\u003eCustom micro-perforated soft-touch grip for better grip and improved feel\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModel Number\u003c\/th\u003e\n\u003ctd\u003eMJBBF55\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBarrel Diameter\u003c\/th\u003e\n\u003ctd\u003e2¾\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCertification\u003c\/th\u003e\n\u003ctd\u003eUSSSA 1.15 BPF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eConstruction\u003c\/th\u003e\n\u003ctd\u003eOne-piece alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStandard Grip\u003c\/th\u003e\n\u003ctd\u003eGray 1.75mm micro-perforated soft-touch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRecommended Use\u003c\/th\u003e\n\u003ctd\u003eCoach pitch, ages 5–7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd\u003eOne year, manufacturer-backed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003csmall\u003eGrip weight and manufacturing tolerances may cause slight deviation from the listed weight.\u003c\/small\u003e\u003c\/p\u003e\n\n\u003ch3\u003eWhy Choose the F5 Junior Big Barrel\u003c\/h3\u003e\n\u003cp\u003eCoach pitch hitters need a bat that's easy to control but still rewards good contact — that's exactly what the F5's expanded sweet spot and balanced swing weight deliver. Not sure which length and weight combination fits your player? Check our \u003ca href=\"\/pages\/bat-sizing-chart\"\u003eBat Sizing Chart\u003c\/a\u003e before you order.\u003c\/p\u003e\n\n\u003ch3\u003eExplore the Full Marucci F5 USSSA Lineup\u003c\/h3\u003e\n\u003cul class=\"sis-links-list\"\u003e\n\u003cli\u003e\u003ca href=\"\/products\/2026-marucci-f5-10-usssa-baseball-bat-msbf5510\"\u003eMarucci F5 -10 USSSA Baseball Bat (MSBF5510)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/2026-marucci-f5-8-usssa-baseball-bat-msbf558\"\u003eMarucci F5 -8 USSSA Baseball Bat (MSBF558)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/2026-marucci-f5-5-usssa-baseball-bat-msbf555\"\u003eMarucci F5 -5 USSSA Baseball Bat (MSBF555)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/junior-big-barrel\"\u003eShop all Junior Big Barrel Bats\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/usssa-baseball-bats\"\u003eShop all USSSA Baseball Bats\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/marucci-baseball-bats\"\u003eShop the full Marucci Baseball Bats collection\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003cdetails class=\"sis-faq-item\"\u003e\n\u003csummary\u003eWhat age is the Marucci F5 Junior Big Barrel bat designed for?\u003c\/summary\u003e\n\u003cp\u003eThe MJBBF55 is built for coach pitch and machine pitch players, generally ages 5–7, who are transitioning from tee ball into their first competitive youth leagues.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails class=\"sis-faq-item\"\u003e\n\u003csummary\u003eWhat does USSSA 1.15 BPF certified mean?\u003c\/summary\u003e\n\u003cp\u003eUSSSA 1.15 BPF (Bat Performance Factor) is the certification standard for USSSA-sanctioned youth and travel ball leagues. It measures the trampoline effect of the barrel to keep performance within a safe, regulated range. Look for the USSSA thumbprint stamp on the taper to confirm certification.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails class=\"sis-faq-item\"\u003e\n\u003csummary\u003eDoes the F5 Junior Big Barrel require a break-in period?\u003c\/summary\u003e\n\u003cp\u003eNo. As a one-piece alloy bat, the F5 is ready to perform right out of the wrapper — there's no composite barrel to break in.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails class=\"sis-faq-item\"\u003e\n\u003csummary\u003eWhat grip does the F5 come with?\u003c\/summary\u003e\n\u003cp\u003eEvery F5 model ships standard with a gray 1.75mm micro-perforated soft-touch grip for improved feel and control.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails class=\"sis-faq-item\"\u003e\n\u003csummary\u003eDoes the F5 Junior Big Barrel bat come with a warranty?\u003c\/summary\u003e\n\u003cp\u003eYes, it includes a one-year manufacturer's warranty. As an authorized Marucci dealer, Smash It Sports fully supports all warranty claims. See our \u003ca href=\"\/pages\/warranty-info\"\u003eWarranty Info\u003c\/a\u003e page for details.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What age is the Marucci F5 Junior Big Barrel bat designed for?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The MJBBF55 is built for coach pitch and machine pitch players, generally ages 5-7, who are transitioning from tee ball into their first competitive youth leagues.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What does USSSA 1.15 BPF certified mean?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"USSSA 1.15 BPF (Bat Performance Factor) is the certification standard for USSSA-sanctioned youth and travel ball leagues. It measures the trampoline effect of the barrel to keep performance within a safe, regulated range. Look for the USSSA thumbprint stamp on the taper to confirm certification.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Does the F5 Junior Big Barrel require a break-in period?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"No. As a one-piece alloy bat, the F5 is ready to perform right out of the wrapper, with no composite barrel to break in.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What grip does the F5 come with?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Every F5 model ships standard with a gray 1.75mm micro-perforated soft-touch grip for improved feel and control.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Does the F5 Junior Big Barrel bat come with a warranty?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, it includes a one-year manufacturer's warranty, fully supported by Smash It Sports as an authorized Marucci dealer.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\u003c\/div\u003e","brand":"Smash It Sports","offers":[{"title":"25\"\/15oz","offer_id":63836899770739,"sku":"MJBBF55-25\"\/15oz","price":129.99,"currency_code":"USD","in_stock":true},{"title":"26\"\/16oz","offer_id":63836899803507,"sku":"MJBBF55-26\"\/16oz","price":129.99,"currency_code":"USD","in_stock":true},{"title":"27\"\/17oz","offer_id":63836899836275,"sku":"MJBBF55-27\"\/17oz","price":129.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0557\/5766\/8405\/files\/MarucciF5-10USSSAJuniorBigBarrelBaseballBatMJBBF553.jpg?v=1785787946","url":"https:\/\/smashitsports.com\/products\/marucci-f5-10-usssa-junior-big-barrel-baseball-bat-mjbbf55","provider":"Smash It Sports","version":"1.0","type":"link"}