League Official
Regular Season

Baseball Bats Standards

December 15, 2016


Beginning with the 2018 Little League season, non-wood and laminated baseball bats used in the Little League (league ages 12 and below), Intermediate (50/70) Division, and Junior League shall bear the USA Baseball logo signifying that the bat meets the USA Baseball Performance Standard.

All BPF – 1.15 bats will be prohibited beginning with the 2018 season. Additionally, starting in 2018, the bat diameter shall not exceed 2-5/8” for these divisions of play.

Senior League

A bat shall not be more than 36 inches in length, nor more than 2-5/8 inches in diameter, and if wood, not less than fifteen-sixteenths (15/16) inches in diameter (7/8 inch for bats less than 30”) at its smallest part. The bat shall not weigh, numerically, more than three ounces less than the length of the bat (e.g., a 33-inch-long bat cannot weigh less than 30 ounces).

All non-wood bats used in the Senior League shall meet the Batted Ball Coefficient of Restitution (BBCOR) performance standard, and such bats shall be so labeled with a silkscreen or other permanent certification mark.

For the 2017 Season Current Bat Regulations Remain in Effect

To be used in games sanctioned by Little League Baseball, during the 2017 season, a bat must meet Little League's current specifications and standards.

Little League (Major) Division and below

The baseball bat shall not be more than thirty-three (33) inches in length nor more than two and one-quarter (2 ¼) inches in diameter. Non-wood bats shall be labeled with a BPF (bat performance factor) of 1.15 or less.

Composite barrel bats are prohibited unless approved by Little League International. A list of approved composite barrel bats can be found on the Little League website, at: www.LittleLeague.org/batlist.

Intermediate (50/70) Division and Junior League

The baseball bat shall not be more than 34 inches in length; nor more than 2-5/8 inches in diameter, and if wood, not less than fifteen-sixteenths (15/16) inches in diameter (7/8 inch for bats less than 30 inches) at its smallest part. All composite barrel bats shall meet the Batted Ball Coefficient of Restitution (BBCOR) performance standard, and such bats shall be so labeled with a silkscreen or other permanent certification mark.

Bat options for Intermediate (50/70) Division and Junior League Baseball:

  • 2 ¼” aluminum/alloy barrel bat labeled with a BPF of 1.15 or less

  • 2-5/8” aluminum/alloy barrel bat (no markings required)

  • 2-5/8” composite barrel bat labeled with BBCOR permanent certification mark




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