Every football player I've ever known has lied about his 40 time. I hear guys in high school talking about running 4.5's and 4.6's. I represented a guy who plays for the Orlando Predators (AFL) but was in NFL camp with the Packers. After I submitted his tape to some NFL teams and got some feedback, I told him "The scouts think you look like 4.6 on film." "Whatttt??? I haven't run a 4.6 since junior high," he replied. "I'm running low 4.4's every day at Fordham!"
So he ran at a few regional scouting combines for most NFL teams. The results: 4.55, 4.57, 4.58. Not bad times by any means, but for a 5'10 guy from a DI-AA school, not impressive enough to warrant draft consideration.