NFL Draft: What to expect from Oklahoma State Pro Day

ESPN and NFL Network will both broadcast live from the day's activities. The event drew so much interest from media and NFL personnel that it had to be credentialed. Barricades will be set up in the weight room, and folks will not be allowed to freely roam the sidelines like in past years.

That's what happens when a top-10 pick (Justin Blackmon) and a top-tier quarterback (Brandon Weeden) come from the same school. But other OSU prospects, such as offensive lineman Levy Adcock and safety Markelle Martin, are also expected to participate in some fashion.

Here are five storylines to watch as OSU's draft hopefuls try to elevate their stock during Friday's workouts.

1. JUSTIN BLACKMON'S 40-YARD DASH TIME

A hamstring injury prevented Blackmon from running the 40 at the NFL Scouting Combine a couple weeks ago, which was the main thing scouts and other team personnel wanted to see him do in Indianapolis. He plans to run it Friday. That hamstring also seemed to affect Blackmon a bit during position drills at the combine. A healthy workout to complement his game film should cement Blackmon as a top-10 pick.

2. BRANDON WEEDEN'S ARM

Weeden was one of the quarterbacks that opted to throw at the combine, and his performance yielded mixed reviews. This time, he'll be chucking the ball to Blackmon and other OSU receivers he's familiar with. Like Blackmon, Weeden had a hamstring injury at the combine that prevented him from running and participating in the agility drills. It'll be interesting to see if he does those Friday.