NBC's mob drama The Black Donnellys, which had a disappointing premiere a week ago, slumped even further at 10:00 p.m. this Monday night as it posted a 5.1 rating and an 8 share (versus last week's 6.0/10). The results were worse than those for the previous occupant of the Monday-night time slot -- Studio 60 on the Sunset Strip. A rerun of CBS's CSI: Miami won the hour with a 9.9/16.