*8* play on Cardinals.

Two division-leaders will clash Sunday afternoon when the Arizona Cardinals host the Green Bay Packers at University of Phoenix Stadium. The home-team is 4-1 ATS in their last five head-to-head meetings, and this looks like a favorable spot for Arizona.

Here are my keys to the game:

1. David Johnson - The Cardinals' rookie running back rushed for 187 yards and three TDs on 29 carries in last week's 40-17 win against the Eagles. He could be in for another big performance as the Packers rank 26th in the league at 4.45 yards allowed per rush on average this season.

2. The Packers' Defense - Green Bay defeated Oakland 30-20 last week but was actually outgained by 372-293 in the match-up. It allowed a rather mediocre QB such as Derek Carr to throw for 276 yards, and I don't like its chances of slowing down the red hot Carson Palmer today.

3. X-Factor - The Cardinals are 10-3 ATS in their last 13 games in December.

Selection: This is a play on the Arizona Cardinals (8*)