So I did a lilttle scouring of the interwebs...

Camron Lewis, WR, 6'1 185 - actually got in a pro day, caught the ball well and ran a blistering 4.28 40...I repeat: a 4.28 40. That will not go unnoticed. Stock is rising.

Zimari Manning, WR, 6'0 200 - no pro day, recovering from foot injury. This dude was all-world at the D2 level, damn near won the Harlon Hill trophy (D2 Heisman)..his tape alone should get him a hard look.

Prince Robinson, DB, 5'10 190 - no pro day, but his draft stock has been steady for the past 2 years as a late round prospect. Pick-6 machine. As somebody else already mentioned, the Houston Texans really like him.

Jai Edwards, Safety, 6'0 200 - no pro day, but his brother is Carson Edwards of the Boston Celtics and Purdue hoops lore. While others haven't been able to get in workouts, he's been getting in gyms and killing it, and filming it. Looks like bro's connections are helping his stock rise. All that aside, I watched this guy completely take over a couple of games last year. To me, he's the most pro ready of the bunch. Heavy hitter and instinctive nose for the football.

Long Shot/FA/CFL:
Ben Holmes, QB, 5'9, 200 - All-everything at Tarleton. 23-2 record as a starter. Actually had a pro day at Buffalo University. Killed it as far as throwing, but officially measured a measily 5'9. He says he measured 5'11, but it was actually 5'9. Toronto of CFL claimed his negotiating rights, so there is a path for him to keep playing.