Marucci F5 -10 USSSA Junior Big Barrel Baseball Bat MJBBF55

Traditional 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. Marucci F5 Junior Big Barrel USSSA Baseball Bat – MJBBF55 Built specifically for coach pitch players ages 5–7, the Marucci F5 Junior Big Barrel pairs a big, forgiving 2¾" barrel with the same one-piece alloy construction found across the rest of the Marucci baseball bat lineup. It's an ideal step-up bat for players moving out of tee ball and into their first coach pitch or machine pitch leagues. Key Features • Multi-variable wall design creates an expanded sweet spot with high durability • Ring-free barrel technology offers greater performance with no "dead" spots • Balanced, one-piece alloy construction produces a clean, consistent, traditional swing feel • Custom micro-perforated soft-touch grip for better grip and improved feel Specifications Model Number MJBBF55 Barrel Diameter 2¾" Certification USSSA 1.15 BPF Construction One-piece alloy Standard Grip Gray 1.75mm micro-perforated soft-touch Recommended Use Coach pitch, ages 5–7 Warranty One year, manufacturer-backed Grip weight and manufacturing tolerances may cause slight deviation from the listed weight. Why Choose the F5 Junior Big Barrel Coach 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 Bat Sizing Chart before you order. Explore the Full Marucci F5 USSSA Lineup • Marucci F5 -10 USSSA Baseball Bat (MSBF5510) • Marucci F5 -8 USSSA Baseball Bat (MSBF558) • Marucci F5 -5 USSSA Baseball Bat (MSBF555) • Shop all Junior Big Barrel Bats • Shop all USSSA Baseball Bats • Shop the full Marucci Baseball Bats collection Frequently Asked Questions What age is the Marucci F5 Junior Big Barrel bat designed for? 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. What does USSSA 1.15 BPF certified mean? 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. Does the F5 Junior Big Barrel require a break-in period? No. 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. What grip does the F5 come with? Every F5 model ships standard with a gray 1.75mm micro-perforated soft-touch grip for improved feel and control. Does the F5 Junior Big Barrel bat come with a warranty? Yes, it includes a one-year manufacturer's warranty. As an authorized Marucci dealer, Smash It Sports fully supports all warranty claims. See our Warranty Info page for details.