Ten years ago, then Minnesota Vikings head coach Mike Tice trumpeted the "Randy Ratio."

The scheme - to direct 40 percent of all passes at Pro Bowl receiver Randy Moss - didn't quite work in a 6-10 season.

Viking fans, you may not care anymore, but Tice is back at the Metrodome, and he's quietly depended on "Marshall Math."

The Bears offense has struggled for consistency this season, except in feeding the football to Pro Bowl receiver Brandon Marshall. He's the third-most targeted receiver in the NFL, according to STATS.

So here's the math: of the Bears 354 pass attempts, 138 of them have been aimed at Marshall. That's 39 percent. Not exactly 40 but close enough.

A few weeks ago, Tice didn't want to talk about the "Randy Ratio."

"No, no," he said. "We don't talk about that."

But the Bears have struggled to do anything else going on a consistent basis. The running game has been erratic, and no other receiver has stepped up to complement Marshall. And even another receiver is open, starting quarterback Jay Cutler clearly has more confidence in targeting Marshall instead. Two weeks ago, Marshall had 12 catches against the Vikings in a 28-10 Bears victory at Soldier Field. But he gained only 92 yards, his lowest per-catch average of the season.

Can't imagine either team expects that to happen again.