Continuity mistake: In the scene where Micky is introducing Charlene to the family and telling Alice & Dicky that he doesn't want to be managed or trained by them anymore in one shot there is a Rock 'em Sock 'em game on the end table, and in the next shot it's not there.
Continuity mistake: In the training ring, Micky has the white bandages on, then he has black boxing gloves and then he has the white bandages on again - all within the same scene.
Continuity mistake: Mark Wahlberg's fight statistics shown before final fight are the same as those shown for the previous fight - wins statistic is 20 for both. it should be 21 for the final fight as it was his victory in the previous fight which qualified him for the final fight/championship match.
Continuity mistake: Upon returning home after the fight in Atlantic City, the wrong side of the face is patched up. He got hit on his right side, and the left side has all the bandages and the right side had no damage at all.