It's hard to imagine a seller's market if the Bills are indeed shopping running back C.J. Spiller before the Oct. 28 trade deadline.

A look at the top 19 rushers this week reveals 13 who were drafted below the second round, including five who were taken in the sixth or seventh rounds and three who went undrafted.

In other words, why in the world would anyone give up any draft pick for a running back who has one 1,000-yard season, turns 28 in August, is averaging 3.4 yards per carry and has two fumbles in 68 carries this season?

Spiller, the ninth overall pick in 2010, is in the final year of his contract. Things aren't going well either. He has yet to play more than 50 percent of the snaps and bottomed out last week with only 12 snaps and six carries for 19 yards in a loss to the Patriots.

"Obviously, you want to get the value that you deserve so you want to have a big year," he told reporters. "Obviously, I'm not off to a great start, but once the smoke clears, I'll be right where I need to be."

Spiller played fewer snaps and had fewer carries than special teamer Anthony Dixon last week. It didn't help Spiller that he fumbled when the Bills were trying to kill the clock in the closing seconds of the first half. The fumble led to the Patriots kicking a field goal to take a 13-7 lead.

THIRD-AND-2

Three observations

• Something for Vikings fans to think about: The Lions' defensive line has 14½ sacks this year. The Bills' defensive line has 16½.

• Not sure what the Rams were waiting on, but left guard Greg Robinson, the No. 2 overall pick, finally started and played all 74 snaps against the 49ers.

• A year ago, the Cowboys gave up a league-worst 24.3 first downs per game. This year, they rank second at 17.0.

Two predictions

• Arizona will be 5-1 when most of its stats say it shouldn't be.

• There's too much attention on DeMarco Murray for him to get a seventh consecutive 100-yard rushing game.

MARK CRAIG