BBCOR (Bat-ball coefficient of restitution) is a baseball bat performance standard created by the National Collegiate Athletic Association (NCAA) to certify the performance of Composite baseball bats used in competition.

BBCOR Bats feature a barrel that does not exceed 2 5/8 inches in diameter and, at most, a -3 length to weight ratio. BBCOR baseball bats are considered Adult Baseball Bats and are required for play in High School and Collegiate Leagues, while some Middle School Leagues require all baseball bats to carry the BBCOR .50 certification mark on their barrel or taper.