Little League International has placed a moratorium on the use of composite bats in the Little League (Majors) Division and all other baseball divisions of Little League, effective immediately.
 
 “Today’s decision of the Little League International Board of Directors Executive Committee is based on scientific research data from the University of Massachusetts (Lowell), which was contracted by Little League Baseball,” Stephen D. Keener, President and Chief Executive Officer of Little League Baseball and Softball, said. “The maximum performance standard for non-wood bats in the divisions for 12-year-olds and below is a Bat Performance Factor (BPF) of 1.15. The research found that composite bats, while they may meet the standard when new, can exceed that standard after a break-in process.” More

Note: The moratorium on composite bats only applies to composite-barreled bats. Bats that have only a metal/alloy in the barrel (and no other material, unless it is in the end cap of the bat) are not subject to the moratorium, regardless of the composition of the handle.

Some composite bats are still allowed for use in the Junior division.

The list of approved composite bats for 2011 is for Junior Leagues only.