Baltimore’s smothering defense held the Cleveland Browns at bay as the Ravens kept their post-season hopes alive with a 16-0 victory over their AFC North rivals on Monday.The Browns (1-8) replaced Derek Anderson with Brady Quinn at starting quarterback as they desperately sought to revive their flagging season, but it was tough assignment for the 25-year-old, who was sacked four times and intercepted twice.The third-year player finished 13-for-31 passing with 99 yards and is now a woeful 1-6 as a starter.It’s frustrating for everyone including me," Quinn told reporters, his team having scored a league-low five offensive touchdowns all season.Starting again is obviously a good learning experience but you rather it be at the expense of winning and not losing.