JIM'S BIG EGO: the Greatest Band in the History of Recorded Music

In addition to his work with the Red Sox, Kantor plays regularly with Jim's Big Ego, a Boston-based rock band; The Split Squad, a so-called "super group" featuring former members of Blondie and The Fleshtones; and The Baseball Project, which writes and plays songs about baseball.

Kantor's high-profile job with the Red Sox has led to other notable performances including a program of ballpark music at Boston's Symphony Hall after the Red Sox's 2004 World Series championship; appearances on ESPN's SportsCenter, where he has played background music on the opening day of the baseball season for several years; and at the Todos Santos Music Festival, a multi-day arts and music festival founded by REM guitarist Peter Buck, at which Kantor plays keyboards and accordion in support of a variety of bands. He was the organist for the Dropkick Murphys "Streaming Outta Fenway" show on May 30, 2020.

from Wikipedia