ST. LOUIS (AP) -- Steven Jackson is already a marked man in the St. Louis Rams' offense. Now he gets to face a Minnesota Vikings defense that hasn't allowed a player to rush for 100 yards in 27 games.
The Vikings (4-0) last gave up 100 yards Nov. 11, 2007, when Green Bay's Ryan Grant had 102. They are allowing just 89.5 yards a game this season.
Jackson takes that as a challenge as he leads the winless Rams (0-4) in trying to snap their 14-game losing streak that is the longest in the NFL. The Rams have won just five of their last 32 games.
"It all boils down to execution," Jackson said Thursday. "We have to make sure the plays we run are effective."
Jackson has been able to run against the Vikings in the past. In Minnesota's last 52 games, only one back besides Grant has topped the 100-yard mark against the Vikings. That would be Jackson, who has two 100-yard games this season.
"I'm pretty sure they are well aware that they have a challenge to stop me," Jackson said.
The last time Jackson faced the Vikings, he gained 142 yards. Jackson scored all four offensive touchdowns, including one receiving, when visiting St. Louis topped Minnesota 41-21 in the 2006 season finale on Dec. 31.
"I know we had a great game then," Jackson said. "I hope to have the same outcome and more importantly, a win."
That was then. Minnesota arrives in St. Louis with one of the best defensive lines in football. Minnesota boasts of three Pro Bowlers in end Jared Allen and tackles Kevin Williams and Pat Williams.
With that strong play up front, the Vikings have led the NFL in rushing defense in each of the last three seasons. They are the only team to accomplish that feat since the AFL-NFL merger in 1970.
This season, Minnesota ranks No. 11 in total defense, allowing 300 yards a game.
Rams offensive coordinator Pat Shurmur has to figure out how to get his unit to be productive. The Rams offense ranks last in scoring this season with just 24 points. In total offense, St. Louis ranks No. 30.
"I've seen what happens when we do things right and we're consistent," Shurmur said. "I think that's what we're preaching to the players. It's very difficult to win in the NFL and once you've popped the first one, the players start to build on that."
That said, the Rams will be facing the best defense they've seen this season.
"Their front seven is very, very dominant in some areas," Shurmur said. "They have two inside defensive tackles and a great pass rush on the edges. Their linebacking corps is solid, not to mention their secondary. So, all around, they're an excellent defense. We'll have to play our 'A' game to get into the end zone."
On the other side of the line of scrimmage Rams defensive coordinator Ken Flajole was asked about facing Minnesota quarterback Brett Favre and All Pro running back Adrian Peterson: "I'm hoping one of those guys misses the team charter."
NOTES: WR Donnie Avery practiced Thursday, but fellow starting WR Keenan Burton did not. Both have hamstring soreness. Fourth WR Ruvell Martin also is dealing with a hamstring pull. He left practice halfway through. ... QB Marc Bulger led the scout team in practice. QB Kyle Boller remains the likely starter with Bulger moving up to backup and rookie QB Keith Null going back to No. 3. ... RT Jason Smith (knee) had more reps in practice but Spagnuolo would not say if he will start Sunday.
(Copyright 2009 by The Associated Press. All Rights Reserved.)