- Associated Press - Wednesday, September 22, 2010

Just three weeks into the NFL season and it takes some searching to find matchups between unbeaten teams.

Look hard enough and you’ll find them: Pittsburgh at Tampa Bay _ yes, Tampa Bay _ and Green Bay at Chicago _ yes, Chicago.

These two games figure to play out in entirely different manners. Steelers at Buccaneers will have a defensive emphasis, particularly on Pittsburgh’s part. That D has a classic Steel Curtain look.

The Monday nighter in Chicago will feature a lot more scoring, especially if the Bears can keep their roll going.

Victories by the Buccaneers and Bears will stamp them as surprise contenders in the NFC. Wins by the Steelers and Packers will further stamp them as Super Bowl candidates.

After shutting down Atlanta and Tennessee, teams that managed big offensive outputs in their other two games, the Steelers are just 2 1/2-point favorites at Tampa. The reason is their uncertainty at quarterback, where either a preseason fourth-stringer (Charlie Batch) or a QB who was cut on the weekend, then re-signed Monday (Byron Leftwich) will start. Plus, the Bucs seem to be maturing on both sides of the ball.

Still, wins over Cleveland and Carolina don’t provide enough evidence that the Bucs are ready for James Harrison, Troy Polamalu and company.

STEELERS, 15-3

Green Bay (minus 3) at Chicago (Monday night)

Chicago has done some sweet things on offense under new coordinator Mike Martz, who seems to have reached QB Jay Cutler. Watch the Packers, with 10 sacks already _ six by LB Clay Matthews _ reach Cutler plenty in prime time.

PACKERS, 27-13

Oakland (plus 4) at Arizona

Time for the Cardinals to clean up the mess of the first two weeks. A hard week of practice will work wonders.

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