Because of illness and a knee injury, Reed didn't practice this week. Reed, a Pro Bowl selection and regular-season leader for Baltimore with nine interceptions, also was listed as questionable for last Sunday's wild card game against Miami, but ended up picking off two passes, returning one for 64 yards for a TD, in the Ravens' 27-9 victory.
Mason sat out Wednesday's practice with a shoulder injury. During the regular season, Mason led the team with 80 catches for 1,037 yards and five touchdowns.
Heap sat out both practice sessions this week with a back injury.
Other starters listed as questionable are cornerbacks Samari Rolle (thigh) and Fabian Washington (neck); linebacker Jarret Johnson (calf); defensive lineman Justin Bannan (foot) and kicker Matt Stover (ankle).
Ruled out for Saturday is backup linebacker Antwan Barnes with a chest injury.