I have only taken a look at the 2009 NFL Combines for this question. It would be a good strategy for the Skins to aggressively target the UDFA at least for some positions. It takes some vision to see what is coming in 2010. Apparently the Panthers used this tactic in 2009 (see below).
2009 Combine running backs 40 yd times for undrafted free agent running backs.
Name Time Team Status Grade
Johnson, Ian 4.46 Minn Dev 36
Sheets, Kory 4.47 Miami Act 57
Brown, Donald 4.51 Ind Act 89
Goodson, Mike 4.54 Carolina Act 70
Kimble, Anthony 4.68 Jets cut 30
Ore, Branden 4.69 Nip 30
Southerland, Brannan 4.69 Jets Nip 42 (full back, 6’, 240lbs)
Johnson, Jeremiah 4.71 Texans RES 59
Sutton, Tyrell 4.75 Carolina Act 31
Nip = not in NFL players list
Scouts Inc. GRADE KEY
90-100 Rare Prospect, 80-89 Outstanding Prospect, 70-79 Solid Prospect, 60-69 Good Prospect, 50-59 Adequate Prospect, 21-49 Borderline Draft Prospect, 20 Free Agent Prospect, and 10 Not a legitimate Prospect.
This sort of review can be expanded for other positions, but the Skins would need to be ready to jump on it. These prospects are not exactly hidden before draft day three.