John Mahoney played the father of Edward Burns in this film, but all of his scenes were cut. However, you can catch a glimpse of him on the left during the wedding footage as the camera follows Edward Burns and Brittany Murphy out of the church. The deleted scenes can be found on the DVD bonus features.
In the last bar scene with Ed Burns and Mathew Lillard, Burns is wearing a t-shirt saying "Up & Down Club" - which is the Jazz club his wife Christy Turlington owned with her sister Erin back in San Francisco. The club had a good run from 1994 till 1999.
When Mike and TC are tussling there is a pool cue that disappears and reappears on the right edge of the table; when they are finished and Paulie and TC are going to play, the cues are set differently than before.