Coach Brian Billick all but ruled out cornerbacks Chris McAlister and Samari Rolle for the Ravens' showdown with the AFC North-leading Pittsburgh Steelers tomorrow night. Neither starting cornerback practiced last night. McAlister, whose strained right knee sidelined him for the team's 19-14 loss to the Buffalo Bills on Oct. 21, and Rolle, who is dealing with a reoccurrence of the illness that contributed to his missing three games this season, are listed as doubtful and questionable, respectively. But asked whether he expected either to play, Billick said, "Doubtful. Very doubtful."