Frazier, Smith scout Justin Blackmon

We don't typically provide a blow-by-blow of every college pro day, but it's worth noting that at least half of the NFC North's head coaches were in Stillwater, Okla., for Oklahoma State's pro day.

Chicago Bears coach Lovie Smith and Minnesota Vikings coach Leslie Frazier were both on hand and saw prize receiver Justin Blackmon work out, according to Jim Thomas of the St. Louis Post-Dispatch. Blackmon did not disappoint, running what Thomas reported was an official 4.46 in the 40-yard dash and also hitting 35 inches on the vertical leap.

Both teams have clear needs for a big receiver, but you would think neither team will draft him in their current first-round spots.

The Vikings are situated at No. 3, where you would think they will draft USC left tackle Matt Kalil or else trade down on the off chance that Baylor quarterback Robert Griffin III isn't taken at No. 2. The Bears, meanwhile, are in the No. 19 slot and would very likely have to trade up to get him.