This Sunday in a NFL Week 3 Matchup, the San Francisco 49ers travel to Heinz Field to take on the Pittsburgh Steelers.

The Steelers has been one of the most impressive team in the NFL so far. Pittsburgh have allowed an NFL-low 10 total points in beating Cleveland and Buffalo. The Steelers haven't started 3-0 since 1992 - their first year under Coach Bill Cowher, who resigned in January. The Steelers defeated Pittsburgh 26-2 as a 10-point favorite in Week 2. The combined score fell UNDER the posted over/under total (39.5).

Pittsburgh usually has a stout defense, and its two-week sack total of 10 is tied for the league lead with Minnesota, while the turnover ratio of plus-3 is good for a second-place tie in the AFC. And the offense is doing more than its share. Willie Parker rushed for 126 yards with a touchdown on 23 carries for Pittsburgh, while Ben Roethlisberger completed 21-of-34 passes for 242 yards with a touchdown and an interception in the win.

The Steelers are 14-1 in games where Parker reaches triple digits on the ground.

The San Francisco 49ers are 2-0 on the heels of two close wins. But a lot of that had to do with their revamped defense - not to mention a little bit of luck down the stretch. If the Niners want to improve to 3-0 against the 2005 Super Bowl champions, they need a much better performance from quarterback Alex Smith. Frank Gore represents the bulk of the San Francisco offense rushed for 81 yards and a pair of touchdowns on 20 carries for San Francisco, while Alex Smith completed 11-of-17 passes for 126 yards. The Niners are 5-0, incidentally, when Smith achieves a QB rating of at least 95.0.

However, the 49ers got some bad news this week when starting outside linebacker Manny Lawson's anterior cruciate ligament in his left knee was torn in practice.

Lawson, a No. 1 draft choice in 2006, is one of the keys in San Francisco's  3-4 defense; he was tied for second on the team with safety Michael Lewis with 14 tackles (8 solo, 6 assists). He also had a half sack and one pass defensed.

Pittsburgh outside linebacker James Harrison, meanwhile, has been cleared to play despite being carried off the field on a stretcher last weekend.

Oddsmakers currently have the Steelers listed as 10-point favorites versus the 49ers, while the game's total is sitting at 37½.

Current streak:
San Francisco has won 2 straight games.
Pittsburgh has won 2 straight games.

Team records:
San Francisco: 2-0 SU, 1-0-1 ATS
Pittsburgh: 2-0 SU, 2-0 ATS

San Francisco most recently:
When playing in September are 4-6
When playing on grass are 5-5
After being outgained are 6-4
When playing outside the division are 4-6

Pittsburgh most recently:
When playing in September are 6-4
When playing on grass are 7-3
After outgaining opponent are 4-6
When playing outside the division are 5-5

A few trends to consider:
San Francisco is 5-1 ATS in its last 6 games on the road
San Francisco is 4-1 SU in its last 5 games
San Francisco is 4-1 ATS in its last 5 games when playing Pittsburgh
San Francisco is 4-1 SU in its last 5 games when playing Pittsburgh
Pittsburgh is 6-1 SU in its last 7 games
Pittsburgh is 6-1 ATS in its last 7 games
Pittsburgh is 4-1 SU in its last 5 games at home
Pittsburgh is 4-1 ATS in its last 5 games at home

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