Baseball Bat Rules by League (USA, USSSA, BBCOR)

Bat legality comes down to a certification stamp printed on the barrel. There are three you need to know:

• USA Baseball (USABat): required by Little League, Babe Ruth/Cal Ripken, AABC, PONY and Dixie for most divisions. Look for the "USA Baseball" mark.
• USSSA (BPF 1.15): required by USSSA travel-ball leagues. Look for the "USSSA 1.15 BPF" thumbprint stamp.
• BBCOR (.50): required for high school (NFHS) and college (NCAA) play. Look for the "BBCOR Certified .50" mark.

It depends entirely on the league, not the age. Two 12-year-olds in the same town can need different bats if one plays Little League (USA) and one plays USSSA travel ball. Always confirm with your league's current rulebook or your coach before buying.

High school and up is the simplest: it's BBCOR, full stop. Drop weight is also capped at −3 for BBCOR bats.

"Drop" is the bat's length in inches minus its weight in ounces — a 30-inch, 20-ounce bat is a −10. Younger players use bigger drops (lighter bats) for bat speed; BBCOR leagues require −3. The certification tells you if the bat is legal; the length and drop tell you if it fits.

Certifications and approved-bat lists are updated periodically, and some bat models have been de-certified after release. Always check the current approved-bat list for your specific league and confirm the stamp is on the bat you're buying.