Brett Charles Sullivan (born February 22, 1994) is an American professional baseball catcher for the San Diego Padres of Major League Baseball (MLB).
Sullivan played college baseball at the University of the Pacific. He was drafted by the Tampa Bay Rays in the 17th round of the 2015 Major League Baseball Draft. He played in the Rays organization until 2021.
Sullivan signed a major league deal with the Milwaukee Brewers on December 1, 2021.
On April 6, 2022, Sullivan was traded to the San Diego Padres along with Korry Howell in exchange for Víctor Caratini.