Last week, 29-year-old Cardinals rookie Robert Gill ran 25 miles per hour on a treadmill -- from a standing start. The former Texas State wide receiver has also been clocked at 4.19 in the 40. So it's not a stretch to say that Gill is, well, fast.
Now, however, he has some competition. Chad Johnson, now 35 years young, has taken the treadmill challenge. As you can see in the YouTube clip above, Johnson runs 24 miles per hour -- with a 2.5 percent incline.
So that happened.
According to PlanetScience.com, Usain Bolt's average speed during his world-record setting 9.58-second, 100-meter sprint in 2009 was 23.4 miles per hour (he maxed out at 27.4 miles per hour).
In addition to being fast, Bolt and Johnson have something else in common: Neither is an NFL receiver. Johnson would like to change that, however; he's said repeatedly that he'd like one more opportunity.
Follow Ryan Wilson on Google+