Many teams want to know if the prospects at the NFL Scouting Combine have heart. Thanks to a newfangled Under Armour shirt — marked by a bright, yellow button just below the chest — they can find that out and much more.

It’s a long wait for the running backs, who will work out later Sunday at the NFL Scouting Combine. A group of them chose to take in the atmosphere at Lucas Oil Stadium as the quarterbacks and receivers ran through drills.

Here’s a look at how some of the top quarterback and wide receiver prospects measured out Saturday at the NFL Scouting Combine.

A strange sight unfurled Saturday in the crowded Lucas Oil Stadium concourse, just outside the media center.

Many of the previously unseen moments of the Scouting Combine are no longer that way, thanks to NFL Network’s cameras. With some down time between drills, some of the offensive linemen tried to grab a rest.

Defensive linemen, considered to be a strength of this year’s draft class, were weighed and measured Saturday at the NFL Scouting Combine.

Jamie Dukes cross-examines Mike Mayock‘s top 5 defensive tackle prospects, shedding light on why Auburn’s Nick Fairley and four others are ready to bring immediate value to an NFL defense.

Auburn QB Cam Newton plans to fully participate in the NFL combine that begins later this week, saying he wants “to be transparent” through the whole draft process.

Two players invited to the NFL Scouting Combine, Purdue wide receiver Keith Smith and Mississippi defensive end Kentrell Lockett, are expected to learn from the NCAA on Monday if they will be granted a sixth year of eligibility.

NFL Network’s Mike Mayock released his latest rankings of top five prospects per position, with Boise State WR Titus Young making one of the biggest leaps. Young is listed third, behind Georgia’s A.J. Green and Alabama’s Julio Jones.