The 49ers would need to beat Seattle and the Cardinals would have to lose to Minnesota. That would give the Cardinals a one-game lead going into the Monday night game at Candlestick.
If the 49ers win that game, they will have control of the division since they will have beaten the Cardinals twice this season.
The Cardinals swear they aren't looking that far ahead. And just minutes after the loss at Tennessee last Sunday, players already were talking about facing the Vikings.
"For us to come out on the short end of the stick still leaves a salty taste in our mouth," linebacker Clark Haggans said. "But Coach Whisenhunt always talks about that 24-hour rule, so as soon as we're done looking at tapes today we're just going to move on, and our focus is on Minnesota."
The Cardinals know all too well the challenge they have Sunday night against the Vikings. Minnesota beat them, 35-14, last year in Arizona, a score that doesn't begin to describe the Vikings' dominance in the game.
The Vikings led 28-0 at halftime. Quarterback Tarvaris Jackson, now a backup, threw four touchdown passes. Adrian Peterson rushed for 165 yards.
"It got out of hand quick," Whisenhunt said. "When you return a punt for a touchdown, when you throw a bomb, that's what got it out of hand quick. Looking back, we had some opportunities on the offensive side to make play early. All of a sudden we're down 28-0 and that's tough, especially against a team like that."
SERIES HISTORY: 20th regular-season meeting. Vikings lead, 10-9, including a 35-14 win last season. The Vikings dominated the Cardinals physically in that game, leading 28-0 at halftime. The Vikings rushed for 239 yards and quarterback Tarvaris Jackson threw four touchdown passes. Cardinals quarterback Kurt Warner passed 50 times and the offense produced only one touchdown.
BY THE NUMBERS: 3 — The Cardinals faced the first and second rushers in the NFL the past two weeks. Now they will take on No.3, the Vikings' Adrian Peterson. Tennessee's Chris Johnson gained 154 yards and the Rams Steve Jackson had 115.
QUOTE TO NOTE: "The hard thing is to make that decision where you feel like you could be hurting your team, but you don't know whether you're putting yourself at risk or not." — QB Kurt Warner on playing with a concussion.
RB Beanie Wells continues to struggle with ball security, one reason Tim Hightower is hanging on to the starting job. Wells has fumbled pitchouts the past two games, but he's dangerous when he does hang on to the ball.
The club has used two tight end sets more often in recent weeks, so the third receiver, Steve Breaston, isn't getting the ball as much. Breaston has four catches in the past two games. His average per game was almost five before then.