Floyd, who will start in left field and bat sixth in the lineup, was considered questionable for this series after aggravating the injury running the bases on Saturday night in Game 3 of the National League Division Series against the Dodgers.
But after undergoing and passing a rigorous workout to the club's satisfaction on Tuesday at Shea Stadium, the Mets elected to put him on the NLCS roster.
The rest of the Game 1 lineup: batting first, shortstop Jose Reyes; batting second, catcher Paul Lo Duca; batting third, center fielder Carlos Beltran; batting fourth, first baseman Carlos Delgado; batting fifth, third baseman David Wright; batting seventh, right fielder Shawn Green; batting eighth, second baseman Jose Valentin; and batting ninth and pitching, Tom Glavine.
Paul Bodi is an executive editor for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.