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.