Brad Pitt is set to replace OCEAN'S THIRTEEN pal Matt Damon in a new movie about Boston, Massachusetts boxer `IRISH' MICKEY WARD. Pitt is reportedly in negotiations to play Ward's brother, DICk Ecklund, in the film, Fighter, which will star Mark Wahlberg as the fighter. Ecklund, himself a talented fighter who sparred with champs like Sugar Ray Leonard, turn his back on a life of crime to help his brother claim glory in the ring. Damon was originally slated to play Ecklund.