2012 NFL Scouting Combine: 3 Quarterback Prospects Who Still Have a Lot to Prove

At the 2012 NFL Scouting Combine there are, as expected, going to be lots of eyes on quarterbacks, such as Andrew Luck and Robert Griffin III.

That being said, here are three mid-to-late-round quarterbacks who must prove their worth in late February to increase their draft stock.

Otherwise, their rookie seasons will have become an utter disappointment before it even begins.

Full view of 2012 NFL Scouting Combine list.

Kellen Moore, Boise State

Putting up excellent numbers throughout his collegiate career, Boise State's Kellen Moore simply underachieved during the Senior Bowl practices and game.

Now, he was 6-of-12 for 50 yards in the game, and only sacked once. However, he still lacks the ideal minimal arm strength and pinpoint downfield accuracy most teams are looking for. Being that the NFL is a pass-oriented league, making throws consistently at 20-30 yards is crucial.

At the same time, defenses are much faster, and his release needs to be quicker. Favoring Moore though, are his solid overall mechanics, and ability to read defenses pre-snap. Taking what the defense gives him is the worst-case scenario, but displaying confidence in making tougher throws is a must.

Luckily, there's really nowhere else for Moore to go but up, as he's considered a seventh-round pick. So anyway you slice it, there's not much pressure to impress.

Russell Wilson, Wisconsin

Wisconsin's Russell Wilson has everything going for him, except size. He's only 5'11", but does weigh a little over 200 pounds, so the strength is there. He can sling the rock anywhere on the field, but when under pressure, he does tend to scramble more often than not.

With the Badgers, however, Wilson got a lot of snaps from under center, and made solid pre-snap reads. The question is how well he performs without a stout running game backing him, as that's not guaranteed in the pros.

He cut down a lot on interceptions from his time at North Carolina State, and increased his completion percentage. In the Senior Bowl though, he was just 4-of-7 for 45 yards and threw one pick, while getting sacked twice.

So, in short, proving to make quicker reads, and showing the ability to manipulate defenses with his eyes will be key.

Brandon Weeden, Oklahoma State

The biggest, and only real main concern with Oklahoma State's Brandon Weeden is turning the ball over. Despite throwing for over 9,000 yards between the past two seasons and 71 touchdowns, he also had 26 interceptions.

His strong arm and decent mobility is what really helps when it comes to buying time and hitting targets downfield, but when Weeden gets cold, he is really cold.

The good news is that Weeden has been more consistent, and did complete 72.3 percent of his throws in 2011, up 5.4 percent from 2010.

Unfortunately, he had an extremely poor Senior Bowl, going 5-of-9 for 56 yards, and throwing two interceptions. So it's clear that Weeden hasn't quite escaped the turnover bug, and that will continue to raise flags in the pros.

At the combine, Weeden must be spot-on accurate, and prove that he can make adjustments on the fly. Because now, he doesn't have receiver Justin Blackmon to bail him out.

John Rozum on Twitter.