Every NFL starting QB's biggest weakness

It's the offseason, when NFL players are working hard to improve and shore up any weaknesses in their game. No player is perfect, and no quarterback is perfect. Not even Tom Brady. So we picked out the one thing each starting quarterback should be working on this offseason…

NFC East

Dak Prescott, Cowboys

Biggest weakness: Processing speed

Prescott's 2017 struggles were overblown, but he was clearly affected by the Cowboys' offensive line taking a step back. While the second-year passer is willing to stay in the pocket and go through his progressions, he doesn't always do it in a timely manner. Only seven quarterbacks required more time to make a throw, on average, than Prescott in 2017.

Eli Manning, Giants

Biggest weakness: Decision making

At 37, Manning is starting to lose the arm strength that once made him the first-overall pick. But he hasn't adjusted his approach accordingly, as he continues to make risky throws into tight windows. Combine the gunslinger mentality with waning arm strength and you get a lot of interceptions.

Carson Wentz, Eagles

Biggest weakness: Footwork

Wentz broke out in his second season and put up MVP-caliber numbers, but his completion percentage was still below average. He misses too many routine throws as a result of unrefined lower body mechanics.

Alex Smith, Redskins

Biggest weakness: Pocket presence

Smith is one of the league's smartest quarterbacks, but he misses a lot of reads because he is easily bothered in the pocket. Even the slightest pressure sends him into escape mode.

NFC North

Mitchell Trubisky, Bears

Biggest weakness: Accuracy

There is a lot to like about Trubisky's game. He's fearless in the pocket and makes quick decisions. But he'll never develop into a top-10 quarterback if he doesn't fix his accuracy issues, which show up all over his film.