St. Louis Rams running back Steven Jackson has played 15 games against the Seattle Seahawks in his career, but has yet to record an 100-yard game on the ground.
That's reason No. 1 why you shouldn't start him on Sunday against the Seahawks.
Reason No. 2?
He missed practice on Thursday with a groin injury, according to the Rams' official Twitter account, and the Seahawks have allowed 3.1 yards per carry (third in the NFL) and two rushing touchdowns this season.
Jackson is expected to play on Sunday against the Seahawks in St. Louis, but he's coming off a disappointing performance against the Chicago Bears (11 rushes, 29 yards) and he's averaged 3.9 yards per carry against the Seattle in his career. In two games against Seattle last year, Jackson totaled 105 rushing yards on 35 carries (3.0 yards per carry), with one rushing touchdown.
In a PPR league, Jackson has some value, but I still wouldn't start him. The Seahawks pass defense has been much better this season (allowing 6.0 yards per attempt, two passing touchdowns), evident in Seattle's last two wins against the Green Bay Packers and Dallas Cowboys.
Should Steven Jackson be started in Week 4?
Even if you are desperate, there are better options out there for you, including New York Giants running back Andre Brown and Detroit Lions second-year back Mikel Leshoure.
You also have to keep in mind that Jackson is inevitably wearing down after a heavy workload throughout the years. He's been a great fantasy back (and running back in general) because of his ability to rack up yards on the ground and catch passes out of the backfield, but that also tends to wear players down faster. Jackson may be 29 years old, but he may as well be in his 30s.
Don't start Jackson this week vs. Seattle. You'll be happy you kept him out of your lineup.