Quarterbacks, running backs and wide receivers took the field on Day 4. Who impressed?

The idea of "draft stock" isn't always something to buy into, but there is no doubting that teams find value from the NFL Scouting Combine. Whether it's in interviews, medicals or on-field work, every general manager and head coach are paying attention to the comings and goings in Indianapolis.

Who moved the needle for us on Day 4?