Fast Times for Keith Marshall Posted Oct 26, 2011 Keith Marshall knows he's tough to catch. Stopwatches tell him so on the regular. The Millbrook High senior tailback has been clocked at 4.25 seconds in the 40, speed that's allowed him to make a career of evading defenders all over North Carolina gridirons. Those jets have also vaulted him to the second ranking among running backs in the ESPNU 150. (ESPN.com)