Babe Ruth & Cal Ripken bat rules (2027)

Notes by division

• T-Ball: Length and barrel limits aren't listed on Babe Ruth's bat rules page.
• Cal Ripken (Rookie, Minor, Major 60/70): Babe Ruth's rule: "No BBCOR bats or USSSA bats." The max length is in the paid rulebook, not the public bat page.
• Babe Ruth 16–18: "All bats must be BBCOR .50."

Stamps used in Babe Ruth & Cal Ripken

• USA Baseball tee ball mark ("Only for use with approved tee balls"): Tee ball bats carry the USA Baseball mark plus "Only for use with approved tee balls". They're legal only with approved low-compression tee balls, never with a regular pitched baseball. Official list.
• USA Baseball (USABat) mark: USA Baseball's youth standard, which makes bats perform close to wood. Barrel up to 2 5/8", no drop limit, and no new USABat is made longer than 32". Required in Little League, Cal Ripken, PONY, Diamond Youth (Dixie), AABC and most rec leagues. Official list.
• one-piece solid wood: One-piece solid wood is legal almost everywhere without a stamp. Multi-piece, laminated, bamboo and composite-wood bats usually do need a certification mark.
• BBCOR .50 mark: The high school and college standard: -3 drop, barrel up to 2 5/8", 36" max. BBCOR bats made before USA BBCOR stay legal in high school indefinitely, but the NCAA requires the new USA BBCOR mark from Jan 1, 2029. Official list.

Sources

• https://www.baberuthleague.org/bat-rules (checked Oct 23, 2026)

This page summarizes published rules. Your league or tournament can add its own, and its ruling is final. Confirm your bat isn't on a decertified or non-approved list before you buy. Questions about a specific model? Check the official list linked above. More bat questions.