Babe Ruth Bat Rules inc. CM/MM

Updated Saturday November 18, 2017 by Lindsey Deberry.





Babe Ruth League Bat Rules

2017 2018
Marked for T-Ball Use USA Baseball T-Ball Stamp
Cal-Ripken Baseball
2 1/4" Barrel with 1.15 BPF Marking USA Baseball Marking
2 5/8" Barrel Maximum
Babe Ruth Baseball 13-15
2 5/8" Barrel
Aluminum or Composite
USA Baseball Marking or BBCOR .50
2 5/8” Barrel
Babe Ruth Baseball 16-18
All Bats Must Be
No Greater Than -3
All Bats Must Be
No Greater Than -3
Babe Ruth Softball
Marked as "Official Softball Bat"
or "Official Fastpitch Bat"
Marked as "Official Softball Bat"
or "Official Fastpitch Bat"



Contained below is a current listing of non-compliant bats that are not eligible, or approved, for use in any Babe Ruth Softball program or activity.

* Babe Ruth League Softball has been advised that Louisville Slugger is recalling the entire current line of the OneX fastpitch softball bat (all lengths and weights) from the market.

Effectively immediately and until notified otherwise, these bats are no longer approved for play in any level of the Babe Ruth Softball program. It should be noted that both the National Collegiate Athletic Association (NCAA) and the National Federation of State High School Associations (NFHS) have taken similar action at the request of Louisville Slugger. Click here for more information.


  • If the illegal bat is discovered prior to a batter completing his "at bat" the bat is simply removed from play and the "at bat" continues.
  • A player who uses an illegal bat or non-conforming barrel dimension and hits a fair ball will be ruled out.  No advancement on the bases will be allowed, and any outs during the play shall stand.  This is an appeal play.  The "at bat" will be considered legal once a pitch is thrown to the next batter.
  • Any bat discovered prior to the game that does not conform to the above rule shall be directed to be removed immediately and not be allowed for use during the game. 

If y



USA Baseball Logo

Implementation of USABat Standard Begins on January 1, 2018

USA Baseball, the national governing body for the sport of baseball in the U.S., in conjunction with participating national member organizations (NMOs) announced the decision to adopt a new method for measuring bat performance in the testing of youth bats.  Informed by the research of leading scientists on the USA Baseball Bat Study Committee, and supported by its NMOs, -- including the American Amateur Baseball Congress (AABC), Amateur Athletic Union (AAU), Babe Ruth Baseball/Cal Ripken Baseball, Dixie Youth Baseball, Little League Baseball and PONY Baseball -- USA Baseball has concluded that recent advancements in science, engineering, technology, and the materials available to fabricate non-wood bats, now allow the manufacturers to construct youth bats that can perform at a wood-like level through the entire range of lengths and weights of youth bats.

The new USA Baseball bat standard (USABat), which will apply to bats that are classified below the NCAA and NFHS level of play, will be implemented on January 1, 2018, allowing the bat manufacturers sufficient time to bring these bats to the marketplace.

The Cal Ripken Division of Babe Ruth League, Inc. have approved the use of the 2 5/8 inch barrel bats for local league play and tournament play beginning in January 2018 and coinciding with the new USA Bat standard.

Similar to the NCAA and NFHS BBCOR standard, which helped to eliminate discrepancies with different length bats and thus provide a more direct measure of bat performance, the new USA Baseball bat standard will allow youth baseball organizations in the United States to reach their goal of establishing a wood-like standard, a standard that will provide for the long-term integrity of the game.

It is important to note there will be no immediate change to youth baseball organizations’ bat rules.  All bats, currently accepted for the respective leagues, remain permissible through December 31, 2017.  Each participating national member organization will incorporate the new standard into their rules for the 2018 season and will begin, with this announcement, to inform their membership of the USABat standard.

Frequently Asked Questions about the USABat standard:

Which national member organizations are implementing this new standard?

To date, the following organizations are participating (in alphabetical order): American Amateur Baseball Congress (AABC), Amateur Athletic Union (AAU), Babe Ruth Baseball/Cal Ripken Baseball, Dixie Youth Baseball, Little League Baseball and PONY Baseball.

Why the change to a wood-like standard?

USA Baseball’s national member organizations believe that a wood-like performance standard will best provide for the long-term integrity of the game. The new standard will not have a drop-weight limit, so young players can use bats made with light-weight materials.

Why not just use wood bats?

Wood is a scarce resource. The new bats will be designed to perform much like wood, where its performance will be limited to the highest performing wood.

How is the USABat standard different from the BBCOR standard used by the NCAA and NFHS?

Both the USA Baseball and NCAA bat performance tests are based on the coefficient of restitution from a bat-ball impact. The scale of results is different, however, since they use different test balls and test speeds. The testing difference is necessary to address the various levels of play in the respective age groups.

Why is USA Baseball involved?  

The national member organizations asked USA Baseball as the national governing body to take the lead in this process to establish a new standard.  Many other national governing bodies set and enforce standards for the equipment in their respective sports. To that end, USA Baseball established a Bat Study Committee of leading scientists and conducted theoretical modeling, field testing and lab testing. The committee shared its findings with the national member organizations, who then endorsed the new USABat standard.

Who were the scientists on the USA Baseball Bat Study Committee?

Alan Nathan, Ph.D., Professor Emeritus of Physics at the University of Illinois

Dan Russell, Ph.D. Professor of Acoustics at Penn State University

Glenn Fleisig, Ph.D. Research Director of American Sports Medicine Institute

Why wait until 2018?

The implementation date of 2018 will allow bat manufacturers sufficient time to conduct the appropriate research, design, testing, manufacturing and shipping needed to get new bats into retail outlets. This date also allows the participating national member organizations adequate time to educate their memberships of the USABat standard.

Is my current bat good for league play?

Yes.  Current league-approved bats can be used through December 31, 2017.

Is safety the reason for the change?

No.  Youth baseball continues to be one of the safest of all sports for youth participants.

How will I know which bat to buy?

All new bats that bear the USABat licensing mark will be permissible for play in the leagues and tournaments of the participating youth baseball organizations.

When can I buy the new bat?

It is the intention of the bat manufacturers to make the new bats available in the fall of 2017, in sufficient time for the 2018 season.


2. Bats. AABC tournament bat rules shall apply in League Play: Only wood, Laminate or composite wood of similar material bats may be used (the only exception to the similar material is the Baum Bat). The bat must not exceed forty-two (42) inches in length and 2.61 inches in diameter.