The Ravens' formidable outside linebacker tandem has combined for 28 sacks this season, with Dumervil's 17 tied with Kansas City Chiefs outside linebacker Justin Houston for most in the NFL. Between Dumervil, Suggs and outside linebacker Pernell McPhee, the Ravens have built an extremely dangerous pass rush. That should pay dividends against relatively inexperienced quarterback Case Keenum, who is expected to start Sunday. He lost all eight of his starts last season for the Texans but has not played in 2014, having been on the St. Louis Rams' practice squad. Keenum has a live arm and doesn't lack for confidence, but could be overwhelmed by Dumervil and Suggs. The Texans rank 25th in passing offense despite the presence of two capable wide receivers in Andre Johnson and DeAndre Hopkins. Although the Ravens have the 30th-ranked passing defense, few teams with this vulnerable a secondary feature a front seven like theirs.