List of Major League Baseball mascots

This is a list of current and former Major League Baseball mascots, sorted alphabetically.

The tradition in the Major League Baseball mascot began with Mr. Met, introduced for the New York Mets when Shea Stadium opened in 1964. Although some mascots came and went over time, the popularity of mascots increased when The San Diego Chicken started independently making appearances at San Diego Padres games in 1977. Philadelphia Phillies management felt they needed a mascot similar to the Chicken, so they debuted the Phillie Phanatic in 1978.