St. Louis completed his hat trick with 1:40 to play in the final game before he joins the Eastern Conference team for the 2003 All-Star Game in Sunrise, Fla.
Maurice, who turned 36 on Thursday, watched his Hurricanes drop their fifth straight road game and saw a key player suffer an injury.
Left wing Erik Cole, one of the standout players during the team's Stanley Cup Finals run last season, suffered a broken left leg midway through the second period, falling awkwardly after being cross-checked by defenseman Dan Boyle.
Rookie Jeff Heerema sliced Carolina's deficit to 2-1 with 4:43 to go in the second, but the Hurricanes fell to 1-8
Tampa Bay improved to 3