Joey Harrington has thrown 77 intercpetions and 72 touchdowns in his career with the Lions and Dolphins. Jim McIsaac/Getty Images

Joey Harrington will struggle in Atlanta.

While Mike Vick deals with his legal problems, Harrington takes over and will be under a lot of pressure. Harrington's drop-back passing skills would appear to make him a good fit for Bobby Petrino's offense, but indecisiveness and lack of poise have have plagued Harrington before. Watching him direct the first team offense through the first two preseason games, it's clear to me he still suffers from occasional lapses of judgment that result in turnovers. Those moments have overshadowed some of the good things he has done while successfully guiding the Falcons to scores. I am confident Harrington will play well for the Falcons in stretches, but eventually his flaws will cost the Falcons games.

Donovan McNabb is farther along in his rehab than anyone could have guessed.

McNabb's performance during the Eagles' preseason game versus the Panthers surprised everyone. Not only did he show confidence in the pocket, but his accuracy, touch and rhythm made one forget he had missed nine months of action with a torn ACL. His pinpoint passing and willingness to distribute the ball to several receivers opened up the Eagles attack.

I still want to see how he bounces back from a big hit in the pocket and whether he still has confidence in his scrambling ability, but if his performance versus the Panthers was any indication, McNabb will be effective by Week 1.

Kellen Clemens is the next Matt Schaub.

Clemens has quietly created a positive buzz in New York. He opened the preseason with an outstanding performance versus the Falcons (16 of 22 for 179 yards with three touchdowns) and followed it up with a solid outing versus the Vikings (6 of 9 for 56 yards with one touchdown and one interception). His performances become more noteworthy when compared to the struggles of starter Chad Pennington.

Clemens has shown better arm strength, touch and accuracy than Pennington during the preseason and the Jets' offense has clicked with him at the helm. While Clemens is unlikely to unseat Pennington as the starter this year, his outstanding start to the preseason has raised his profile. Matt Schaub was the most recent backup quarterback to parlay successful preseason performances into a starting job, and Clemens could be next.

Vikings fans shouldn't worry about Tarvaris Jackson.

There has been a lot of speculation regarding the Vikings' quarterback position, but I think Jackson will be fine as the starter. He's a talented athlete with a strong arm and great physical tools, and he'll benefit from Brad Childress' emphasis on a running game featuring the talents of Adrian Peterson and Chester Taylor. Defenses will use eight-man fronts to stop the run, daring Jackson to beat them with his arm. Don't be surprised if he does, because he has made tremendous strides as a passer during the offseason. He no longer looks tentative and unsure of his reads in the pocket, and has done a good job of patiently letting the system determine where the ball should go on every play.

Daunte Culpepper is shaking off the rust in Oakland.

Culpepper was cast aside by Cam Cameron and the Dolphins during the summer, but he is quietly rounding back into form in Oakland. After spending his first two weeks trying to learn a new offensive system, Culpepper is beginning to look comfortable in a Raiders' uniform.

He started out a little shaky versus the Cardinals in his first game, but appeared to have better rhythm and timing versus the Niners last Saturday. He worked through his reads quickly and was more decisive distributing the ball to open receivers.

His confidence in his knee is back and his natural athletic instincts are also returning. He did not hesitate to scramble or leave the pocket when pressured and also looked very comfortable throwing on the move off naked-bootleg action. He is not all the way back to his old form, but he has shown more in two weeks in Oakland than he displayed during his brief tenure with the Dolphins.

Aaron Rodgers has stepped up his game.

Rodgers entered the preseason with questions and uncertainty regarding his ability to succeed Brett Favre, but his strong start should quiet his critics. Rodgers has completed more than 60 percent of his passes with three touchdowns and no interceptions through two preseason games. He is finally showing the poise, accuracy and touch that made him the Packers' first-round choice in 2005.

But most impressive has been the leadership ability he has displayed in guiding the Packers to six scoring drives in almost four quarters of action. Rodgers has been patient enough to take what the defense offers, but has also made them pay when they have decided to blitz or pressure off the edge.