A struggling Buffalo Bills offense will face a formidable Baltimore Ravens defense in a Week 4 matchup Sunday at 1:00 p.m. ET.

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The 2-1 Ravens have recovered well from a 49-27 season-opening loss against the Denver Broncos, in which their defense allowed 510 yards and seven touchdown passes to Peyton Manning in that game. Since then they've yielded only five field goals and 523 yards in home victories over Cleveland and Houston.

"In the NFL you're going to have highs and lows," said linebacker Terrell Suggs, who has a team-high three of Baltimore's 11 sacks. "(The Broncos were) the first game. They had some success. We knew we had to go to work."

The Ravens put that to work in Sunday's 30-9 rout of a Texans team which totaled 61 points in its first two games.

"They've played two weeks now where they haven't given up a touchdown," said quarterback Joe Flacco, who has thrown one TD but no interceptions in the last two games. "That's pretty good. You're going to have a tough time losing when that happens."

Meanwhile, Buffalo will have C.J. Spiller back after a quad injury limited him to just 10 carries against the New York Jets. Fred Jackson tried to pick up the slack, rushing seven times for 72 yards and catching four passes for 37.

"We want to make sure we're giving our players an opportunity to make those plays," said coach Doug Marrone, whose team's three games have been decided by 10 points. "Am I disappointed? Absolutely. I can tell you this, EJ Manuel is disappointed too. I think those are the things that we'll work on to correct."