Palmieri recorded a career-high 30 goals, 27 assists and 57 points last season and signed a $23.25 million, five-year deal this summer. Among U.S.-born players, only Chicago's Patrick Kane and San Jose's Joe Pavelski scored more goals last season.
In 280 NHL games, the 25-year-old has 73 goals and 73 assists. U.S. general manager Dean Lombardi said Palmieri brings an all-around game that we're confident will fit nicely.''
Named to the original roster, Callahan underwent surgery in June to repair a labral tear in his right hip. He's expected to miss at least the first month of the regular season for Tampa Bay.