Dolphins quarterback Daunte Culpepper and coach Nick Saban engaged into a heated argument during Friday's practice. The exchange comes less than seven months after Culpepper's celebrated arrival in South Florida. The reasons for the argument, including how or why it began, were unclear. Several players confirmed the incident took place, but simply called it ``family business.'' Wide receiver Chris Chambers said Culpepper came into Sunday's game with an optimistic attitude, even after Saban placed him on the team's inactive list as a result of health concerns. ''I felt sorry for [Culpepper],'' said Chambers, who wouldn't elaborate on details. ``I know he wanted to play. It was the coach's decision, so we just went with it. We support whatever Coach wants to do, and we'll support Joey [Harrington] when he gets in the game. ``I'm sure he was more frustrated than anybody. He was real positive when he came back today in the locker room. He tried to help as much as he could on the sidelines.''