Saturday marks Day 4 of the 2012 NFL Combine in Indianapolis: the first arrivals finish out their schedules while the defensive backs begin their own process for the next four days. And in between the first and last groups there will be more measurements and psychological testing.

Colorado offensive tackle Ryan Miller will close out his Combine with timing, stations and skill drills on Saturday -- in other words, he'll be on the field running and moving around cones and whatnot. The same for Boise State's Nate Potter.

Kellen Moore and Doug Martin will attend an NFLPA meeting, undergo more psychological evaluation and take part in move interviews. Their fellow Boise State teammates, defensive ends Tyrone Crawford and Shea McClellin and defensive tackle Billy Winn, will get their official measurements.

George Iloka arrives on Saturday morning, takes part in orientation and gets some X-rays.

Check out the full schedule here.

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