You better make sure to set those Ben Roethlisberger alerts on your phone this week because that's the one injury you're going to want to keep an eye on if you plan on betting the Steelers-Ravens game in Week 9.

With Roethlisberger's status up in the air, the Ravens opened as a 2.5-point favorite over Pittsburgh, and the line quickly jumped to three points by late Sunday night.

CBS Sports NFL Insider Jason La Canfora has reported that the Steelers are anticipating that Roethlisberger will play. If Big Ben can go, you could possibly see this line swing by two or three points in the Steelers direction.

Of course, even with Big Ben in the lineup, the Steelers are no lock to win. A Ravens team that went 5-11 last year beat the Steelers twice. Also, Baltimore has won five of its six past games straight-up against the Steelers, including a playoff game in January 2015. The Steelers haven't won in Baltimore since 2012.

The other team in Pennsylvania also opened as an underdog in Week 9. The Eagles are currently a three-point road underdog to the Giants. Although the Eagles have lost three of four, they've won four straight against the Giants.

Let's take a look at the other odds from Week 9.

NFL Week 9 early odds

(All lines via VegasInsider.com)

Falcons (5-3) at Buccaneers (3-4) (Opening line: Falcons, -2 points)

Current line: Falcons, (-3 points). Since the beginning of the 2015 season, the Buccaneers have really only had success against one team in the NFL: the Falcons. The Bucs are 3-0 straight-up against Atlanta and just 6-14 against all other NFL teams. On the other hand, the Falcons are 4-0 against the spread in road games this year and they'll be going up against a Bucs team that's 0-3 ATS at home.

Jaguars at Chiefs (Opening line: Chiefs, -8 points)

Current line: Chiefs, (-8 points). This will be an interesting line to watch over the next few days because there's a chance the Chiefs won't have Alex Smith. Of course, that might not matter because after Smith went down with a concussion against Indy, backup QB Nick Foles came in and looked impressive, throwing for 223 yards and two touchdowns. That being said, home-field advantage hasn't exactly been an advantage recently for Kansas City. Since the beginning of the 2015 season, the Chiefs are just 3-6-1 ATS at Arrowhead Stadium.

Lions at Vikings (Opening line: Vikings, -7 points)

Current line: Vikings, (-6.5 points). No rivalry in the NFL has been more evenly matched than the Vikings and Lions have been over the past six years. Since 2010, the two teams have played 12 times, with each team winning six of those. If there's one time you want to think about taking the Vikings though, it's when they play at home. Since the beginning of 2013, the Vikings are an NFL-best 19-8 ATS at home, which includes a 3-0 ATS record in 2016.

Eagles at Giants (Opening line: Giants, -2 points)

Current line: Giants, (-3 points). Don't be surprised if people start jumping on Philly for this game, especially after their near upset of the Cowboys on Sunday night. If Eli Manning and the Giants are going to cover this spread, they're going to have do it going up against the NFL's second-ranked defense. Manning will also be going up against a team that he has lost to four times in a row. Also, the Giants are just 2-7 against the Eagles in their past nine meetings. So why would you bet the Giants? Well, the Eagles are just 1-3 ATS on the road this season.

Cowboys at Browns (Opening line: Cowboys, -7 points)

Current line: Cowboys (-7 points). Although the Browns have been a trainwreck this year, they have been able to keep a few games close. In four of their eight losses, the Browns went down by six or fewer points. That being said, this team hasn't been able to cover games at home. The Browns are 0-3 ATS in Cleveland and just 2-6 ATS overall this season. The Cowboys are 3-0 ATS on the road, which could be a recipe for disaster for the Browns.

Jets at Dolphins (Opening line: Dolphins, -3 points)

Current line: Dolphins, (-3.5 points). No matter how bad the Jets look, they always play well in Miami. The Jets haven't lost in South Florida since their regular-season finale in 2011. Although the Dolphins are 3-1 straight-up at home this season, they're just 2-2 ATS. The Jets 2-3 ATS on the road. When the Patriots aren't playing, you bet AFC East games at your own peril.

Steelers at Ravens (Opening line: Ravens, -2.5 points)

Current line: Ravens, (-3 points). There's one big reason the Ravens are favored to win this game right now and that's because no one knows for sure yet if Ben Roethlisberger is going to play. If Roethlisberger can't go, that means the Steelers will either have to roll with Landry Jones or Zach Mettenberger. Mettenberger has one of the ugliest starting records in NFL history, going 0-10 straight-up in his 10 career starts. Jones is 1-2 straight-up, including a Week 7 loss to the Patriots.

Saints at 49ers (Opening line: Saints, -3 points)

Current line: Saints, (-3 points). The Saints don't have a great record on the road this year (1-2), but they are covering the spread when they leave New Orleans. In their three road games, the Saints are 2-0-1 ATS, making them one of only five teams in the NFL that is unbeaten ATS on the road. The 49ers have been one of the ugliest teams this season for gamblers, going just 1-6 ATS, and that only cover came in Week 1. The Saints haven't lost a regular-season game in San Francsico since 2001.

Panthers at Rams (Opening line: Panthers, -2 points)

Current line: Panthers, (-3 points). The Panthers have been one of the worst road teams in the NFL this season, going 0-3 both ATS and straight up. Actually, the Panthers have basically been an ugly team to bet on all season, going just 2-5 ATS overall, which is the fourth-worst mark in the NFL this year. As for the Rams, they're 11-7 ATS as a home underdog since Jeff Fisher took over as coach in 2012.

Colts at Packers (Opening line: Packers -6.5 points)

Current line: Packers, (-7 points). Aaron Rodgers is likely going to create a huge problem for a Colts defense what went into Week 8 ranked 28th in the NFL. That ranking's not going to improve after their loss to Kansas City in a game where the Colts secondary got shredded by Nick Foles. Yes, you read that right, the Colts got shredded by Nick Foles. Of course, even if the Colts defense struggles, Andrew Luck might be able to keep Indy in the game. Since his rookie year in 2012, Luck and the Colts are 11-7 ATS against NFC teams, the second-best record of any AFC team over the span. Rodgers has also been pretty good against non-conference teams, with the Packers going 12-5 straight up and 9-7-1 ATS since 2012.

Titans at Chargers (Opening line: Chargers, -5.5 points)

Current line: Chargers, (-4.5 points). If the Titans can upset the Chargers in this game, it will mark the first time since 2011 that Tennessee will be over .500 nine games into the season. The trouble for the Titans is that the Chargers are built to stop what Tennessee does well: Running the ball. Going into Week 8, the Titans had the second-best rushing attack in football. However, that might not mean much going up against a Chargers defense that has surrendering less than 90 yards per game. The Titans have an ugly record as a road underdog. Since 2014, Tennessee is 6-13 ATS as a road dog, the second-worst mark in the NFL over that span. The Titans haven't won in San Diego since 1990, when they were the Houston Oilers.

Broncos at Raiders (Opening line: Pick'em)

Current line: Pick'em. If you like pick'ems, then this is the ultimate game for you. Not only is first place in the AFC West on the line, but this game will also feature one of the NFL's top offenses in Oakland, going up against one of the league's top defenses in Denver. Although this game's in Oakland, that city hasn't been too kind to the Raiders this year (maybe it's time to move). The team is 1-2 straight up and 0-3 ATS at the Coliseum. The Broncos have won of eight of their last nine meetings straight up against the Raiders.

Bills at Seahawks (Opening line: Seahawks, -5.5 points)

Current line: Seahawks, (-7 points). If there has been one sure straight-up lock in the NFL over the past few years, it's this one: the Seahawks at home against an AFC team. Since Russell Wilson's rookie year in 2012, the Seahawks are 9-0 straight up against the AFC and 6-3 ATS. In all three instances where the Seahawks didn't cover, the spread was in double digits. Of course, that might not matter to the Bills, who have dominated the NFC West this year. Not only is Buffalo 3-0 against the division, but they've covered the spread in all three gams. The Bills beat the Rams by 11, the Cardinals by 15 and the 49ers by 29.

Bye weeks: Bears, Bengals, Cardinals, Patriots, Redskins, Texans