Concussion to Sideline Roethlisberger

Steelers quarterback Ben Roethlisberger is expected to sit out Sunday night's game at Baltimore because of concussion-related issues.

The unexpected development apparently means inexperienced Dennis Dixon would make his first NFL start.

Roethlisberger practiced all week despite sustaining his fourth concussion since 2006 during an overtime loss in Kansas City on Sunday. During his only interview of the week, he said Thursday he had been cleared to play.

Roethlisberger's apparent decision to not play occurred in the same week the NFL has taken a heightened stance on protecting players from head injuries.